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  1. .PO 2
  2. .mt 4
  3. .HM 2
  4. .MB 4
  5. .FM 2
  6. .FO       by Morrison, & Cole, c/o STAR-NET at (305) 639-0715 by modem
  7. .HE    * * *   H A L L E Y   F A C T S   D E C E M B E R   1 9 8 5   * * *
  8. .op
  9.                                INTRODUCTION
  10. Halley'≤á [rhyme≤á witΦ "valleys"▌ Come⌠ i≤ composeΣá oµá ßá small¼á brigh⌠ ì
  11. nucleu≤á (probabl∙ 1-│ kφ across)¼á surroundeΣ b∙ ß mucΦ large≥ fuzz∙ head¼ ì
  12. o≥ "comaó (Latiε fo≥ "hair")¼á 1░ 00░ t∩ ▒ 00░ 00░ kφ across¼ anΣ ß fainte≥ ì
  13. ga≤ (mainl∙ carboε monoxidσ anΣ nitrogen⌐ anΣ dus⌠ tai∞ streaminτ awa∙ froφ ì
  14. thσ head«á  Onl∙ thσ nucleus¼á composeΣ oµ ice¼ dust¼ anΣ stone≤ mixeΣ witΦ ì
  15. frozeεá gases¼á i≤á solid«á  Thσ tota∞ mas≤ oµ thσ come⌠á i≤á approximatel∙ ì
  16. 65,000,00░ metriπ tons.
  17.  
  18.                                WHERE IS IT?
  19. Thi≤á montΦá thσ come⌠ continue≤ movinτ wes⌠ anΣ south¼á dippinτ belo≈á thσ ì
  20. Grea⌠á Squarσá oµá Pegasus¼á througΦ thσá Circle⌠á oµá Pisces¼á anΣá towarΣ ì
  21. Aquarius«  I⌠ wil∞ brighteε rapidly¼ froφ 6.┤ a⌠ thσ beginninτ oµ thσ montΦ ì
  22. t∩á 5.╣á a⌠ thσ end«á  Thσ come⌠ wil∞ transi⌠ thσ north-soutΦá meridiaεá a⌠ ì
  23. abou⌠á 18:0░á anΣá bσ abou⌠ 5░ degree≤ abovσ thσ southerεá horizoεá (a⌠á 4░ ì
  24. degree≤á nortΦ latitude)«á  Notσ tha⌠ thi≤ positioε anΣ timσ meaε tha⌠á thσ ì
  25. come⌠á i≤á movinτá int∩á thσ sunse⌠ regioε oµá thσá sky¼á anΣá wil∞á becomσ ì
  26. progressivel∙ washeΣ ou⌠ b∙ thσ sunligh⌠ unti∞ it≤ re-appearancσ iε Spring.
  27.  
  28.                          COMET DATA FOR MID MONTH
  29.         Right Ascension:  03 hours 49.02 minutes                        
  30.         Declination:      23 degress 17.652 minutes (near Gamma Piscium)
  31.         Distance:         122 982 530 km from Earth                     
  32.         Magnitude:        6.2                                           
  33.         Velocity:         32.31 km/s                                    
  34.  
  35.                             OBSERVING THE COMET
  36. Durinτ thi≤ month'≤ moon-freσ "windowó (1s⌠ t∩ 15th)¼á thσ come⌠ shoulΣá bσ ì
  37. brigh⌠ enougΦ t∩ spo⌠ easil∙ iε binocular≤ anΣ finderscopes«  I⌠ i≤ severa∞ ì
  38. arπá minute≤ across¼á witΦ ß condenseΣ nucleu≤ anΣ ß smal∞ tail¼á whicΦá i≤ ì
  39. generall∙áá orienteΣá awa∙á froφá EartΦá (hiddeεá mostl∙á - unti∞á Spring)«  ì
  40. Binocular≤á (7x35¼á 7x50¼á o≥ 10x50⌐ wil∞ bσ perfec⌠ fo≥ aεá overal∞á view«  ì
  41. They'rσ portable¼ light¼ relativel∙ inexpensive¼ anΣ offe≥ gooΣ ligh⌠ gras≡ ì
  42. anΣ easσ iε locatinτ fain⌠ celestia∞ object≤ likσ Halley'≤ Comet«  AlthougΦ ì
  43. telescope≤á ma∙ revea∞ subtlσ detail≤ iε thσ head¼á the∙ aren'⌠á wide-anglσ ì
  44. instruments«  Binocular≤ wil∞ bσ requireΣ t∩ encompas≤ thσ comet'≤ tail.
  45.  
  46.                           PHOTOGRAPHING THE COMET
  47. Thσá simples⌠á wa∙ t∩ photograpΦ thσ come⌠ i≤ t∩ usσ ß tripoΣ anΣ ßá 3╡á mφ ì
  48. camerßá witΦá ßá cablσ release«á  Aiφ thσ camerß anΣá focu≤á thσá len≤á fo≥ ì
  49. infinity«  ┴ 30-seconΣ exposurσ wil∞ recorΣ brigh⌠ star≤ anΣ sho≈ thσ come⌠ ì
  50. a≤ ß non-stella≥ bal∞ witΦ ß fuzz∙ tail«  Exposure≤ oµ morσ thaε 60-second≤ ì
  51. wil∞á recorΣ dimme≥ stars¼á bu⌠ sho≈ traileΣ image≤ oµ star≤ anΣ thσ comet«  ì
  52. Choosσ ß 2╕ t∩ 5░ mφ len≤ (fo≥ adequatσ sk∙ coverage⌐ witΦ ß foca∞ rati∩ oµ ì
  53. f/┤ o≥ faste≥ (fo≥ ß brighte≥ image)«á  Trackinτ b∙ mountinτ ß camerßá witΦ ì
  54. norma∞á o≥ 135mφ len≤ "piggybackó ato≡ ß motor-driveε telescopσ i≤ thσ onl∙ ì
  55. wa∙á t∩ managσ longe≥ exposures«á  Fo≥ bes⌠ results¼á usσ FUJICHROM┼á colo≥ ì
  56. slidσá filφá witΦ markeΣ IS╧ (ASA⌐ valuσ oµ 400«á   Ektachromσ i≤ ßá seconΣ ì
  57. choice¼á duσ t∩ rea∞ speeΣ fallinτ ofµ iε timσ exposure≤ likσ these║ markeΣ ì
  58. value≤ oµ speeΣ arσ N╧ indicato≥ pas⌠ 6░ second exposures!!
  59.  
  60.                                 NEXT MONTH
  61. Durinτá Januar∙á thσ come⌠ move≤ int∩ thσ barreε sta≥á fielΣá oµá Aquarius¼ ì
  62. whicΦá rapidl∙á sink≤ int∩ eveninτ twiligh⌠ durinτ thσá month«á  I⌠á shoulΣ ì
  63. ente≥á diφá naked-eyσ visibilit∙ (5tΦ magnitude⌐ anΣ bσ visiblσá relativel∙ ì
  64. easil∙ iε binocular≤ o≥ ß finde≥ telescope«  Thσ moon-freσ observinτ windo≈ ì
  65. wil∞ be the 1st to the 15th.
  66. .paè.PO 4
  67. .MT 8
  68. .HM 4
  69. .MB 8
  70. .FM 4
  71. .op
  72. .HE              EPHEMERIS FOR COMET HALLEY STARTING 11/20/1986
  73. .FO              Courtesy of STAR-NET at (305) 639-0715 by modem
  74.  
  75. Comparinτá thi≤ curren⌠ inf∩ t∩ thσ table≤ tha⌠ follo≈ fo≥ Apri∞ show≤ tha⌠ ì
  76. brightnes≤ (lo≈ valuσ oµ "magntude"⌐ i≤ par⌠ oµ thσ rationalσ fo≥ thσá bes⌠ ì
  77. expectation≤ fo≥ seeinτ t∩ occu≥ iε thσ Spring«  ┴ differencσ oµ 1.░ iε maτ ì
  78. i≤ ß brightnes≤ rati∩ oµ 2.5¼á o≥ morσ thaε onσ camerß ╞ stop«  Onl∙ ß morσ ì
  79. detaileΣá examinatioεá oµ thσ coordinatσ datß wil∞ sho≈ thosσ no⌠á familia≥ ì
  80. witΦá celestia∞ chart≤ tha⌠ thσ come⌠ i≤ gettinτ to∩ closσ t∩ thσá suεá no≈ ì
  81. (contras⌠ die≤ duσ t∩ sun'≤ glare)¼á anΣ wil∞ bσ to∩ lo≈ oε thσ horizoε fo≥ ì
  82. viewinτ froφ point≤ iε thσ US┴ wheε i⌠ re-appear≤ iε Spring«  Iε Apri∞ froφ ì
  83. thσá Floridßá Keys¼á thσá come⌠ wil∞ bσ withiε abou⌠ 3░ degree≤á abovσá thσ ì
  84. horizon¼ whicΦ i≤ thσ regioε wherσ atmospheric≤ severel∙ limi⌠ contras⌠ anΣ ì
  85. definitioεá oµá celestia∞á objects«á  Seσ thσá filσá "HALLEY.TXTóá fo≥á ou≥ ì
  86. solutioεá t∩á thσ observinτ problems¼á anΣ ß pleasurablσ escapσá tri≡á tha⌠ ì
  87. include≤ pokinτ arounΣ Mayaε ruin≤ anΣ islanΣ beaches....
  88.  
  89.  
  90.     PAGE  1     DAYS FROM    COORDINATES:        DISTANCES (AU):  PREDICTED
  91.        DATE     PERIHELION    RA       DEC        SUN    EARTH    MAGNITUDE
  92.     +----+----+----+----+----+----+----+----+----+----+----+----+----+----+
  93.     11/20/85       -82       03:03    20:23       1.64   0.66        6.4 
  94.     11/21/85       -81       02:52    19:57       1.63   0.65        6.4 
  95.     11/22/85       -80       02:40    19:28       1.61   0.64        6.3 
  96.     11/23/85       -79       02:29    18:56       1.60   0.63        6.2 
  97.     11/24/85       -78       02:18    18:21       1.58   0.63        6.2 
  98.     11/25/85       -77       02:06    17:42       1.57   0.62        6.1 
  99.     11/26/85       -76       01:55    17:01       1.55   0.62        6 
  100.     11/27/85       -75       01:44    16:18       1.54   0.62        6 
  101.     11/28/85       -74       01:32    15:33       1.52   0.62        5.9 
  102.     11/29/85       -73       01:21    14:46       1.51   0.63        5.9 
  103.     11/30/85       -72       01:11    13:58       1.49   0.63        5.9 
  104.     12/ 1/85       -71       01:00    13:09       1.48   0.64        5.9 
  105.     12/ 2/85       -70       00:50    12:20       1.46   0.64        5.8 
  106.     12/ 3/85       -69       00:41    11:32       1.45   0.65        5.8 
  107.     12/ 4/85       -68       00:31    10:43       1.43   0.66        5.8 
  108.     12/ 5/85       -67       00:22    09:56       1.42   0.67        5.8 
  109.     12/ 6/85       -66       00:14    09:10       1.40   0.69        5.8 
  110.     12/ 7/85       -65       00:06    08:25       1.39   0.70        5.8 
  111.     12/ 8/85       -64       23:58    07:42       1.37   0.71        5.7 
  112.     12/ 9/85       -63       23:51    06:00       1.36   0.73        5.7 
  113.     12/10/85       -62       23:44    06:20       1.34   0.74        5.7 
  114.     12/11/85       -61       23:37    05:41       1.33   0.76        5.7 
  115.     12/12/85       -60       23:31    05:04       1.31   0.78        5.7 
  116.     12/13/85       -59       23:25    04:29       1.30   0.79        5.7 
  117.     12/14/85       -58       23:20    03:56       1.28   0.81        5.7 
  118.     12/15/85       -57       23:14    03:24       1.27   0.83        5.7 
  119.     12/16/85       -56       23:09    02:54       1.25   0.85        5.7 
  120.     12/17/85       -55       23:05    02:25       1.23   0.87        5.7 
  121.     12/18/85       -54       23:00    01:58       1.22   0.89        5.6 
  122.     12/19/85       -53       22:56    01:32       1.20   0.91        5.6 
  123. .PAè    PAGE  2     DAYS FROM    COORDINATES:        DISTANCES (AU):  PREDICTED
  124.        DATE     PERIHELION    RA       DEC        SUN    EARTH    MAGNITUDE
  125.     +----+----+----+----+----+----+----+----+----+----+----+----+----+----+
  126.     12/20/85       -52       22:52    01:07       1.19   0.93        5.6 
  127.     12/21/85       -51       22:48    00:43       1.17   0.95        5.6 
  128.     12/22/85       -50       22:45    00:22       1.16   0.97        5.6 
  129.     12/23/85       -49       22:41    00:01       1.14   0.99        5.6 
  130.     12/24/85       -48       22:38   -00:20       1.13   1.01        5.5 
  131.     12/25/85       -47       22:34   -00:39       1.11   1.03        5.5 
  132.     12/26/85       -46       22:31   -00:58       1.10   1.05        5.5 
  133.     12/27/85       -45       22:28   -01:16       1.08   1.07        5.5 
  134.     12/28/85       -44       22:25   -01:33       1.06   1.09        5.4 
  135.     12/29/85       -43       22:23   -01:49       1.05   1.11        5.4 
  136.     12/30/85       -42       22:20   -02:05       1.03   1.14        5.4 
  137.     12/31/85       -41       22:18   -02:20       1.02   1.16        5.4 
  138.      1/ 1/86       -40       22:15   -02:35       1.00   1.18        5.3 
  139.      1/ 2/86       -39       22:13   -02:49       0.99   1.20        5.3 
  140.      1/ 3/86       -38       22:11   -03:02       0.97   1.22        5.2 
  141.      1/ 4/86       -37       22:08   -03:15       0.96   1.24        5.2 
  142.      1/ 5/86       -36       22:06   -03:28       0.94   1.26        5.2 
  143.      1/ 6/86       -35       22:04   -03:41       0.93   1.28        5.1 
  144.      1/ 7/86       -34       22:02   -03:53       0.91   1.29        5.1 
  145.      1/ 8/86       -33       22:00   -04:04       0.90   1.31        5 
  146.      1/ 9/86       -32       21:58   -04:16       0.88   1.33        5 
  147.      1/10/86       -31       21:56   -04:27       0.87   1.35        4.9 
  148.      1/11/86       -30       21:54   -04:39       0.85   1.37        4.9 
  149.      1/12/86       -29       21:53   -04:50       0.84   1.39        4.8 
  150.      1/13/86       -28       21:51   -05:01       0.83   1.41        4.8 
  151.      1/14/86       -27       21:49   -05:11       0.81   1.42        4.7 
  152.      1/15/86       -26       21:47   -05:22       0.80   1.44        4.6 
  153.      1/16/86       -25       21:45   -05:33       0.78   1.46        4.6 
  154.      1/17/86       -24       21:44   -05:42       0.77   1.47        4.5 
  155.      1/18/86       -23       21:42   -05:53       0.76   1.49        4.5 
  156.      1/19/86       -22       21:40   -06:04       0.74   1.50        4.4 
  157.      1/20/86       -21       21:38   -06:15       0.73   1.52        4.4 
  158.  
  159.  
  160. Note║ thσ coordinate≤ R┴ ª DE├ arσ celestia∞ coordinate≤ tha⌠ designatσ thσ ì
  161. positioεá iε thσ sk∙ relativσ t∩ thσ sta≥ field¼á no⌠ you≥ positioε oεá thσ ì
  162. earth«á  Usσá theφá b∙ comparisoε t∩ thσ coordinate≤ oµ somethinτá yo⌡á caε ì
  163. recognize«á  Thσ chart≤ iε Sk∙ ª Telescopσ magazinσ arσ exellen⌠ reference≤ ì
  164. t∩á aiΣá iε locatinτ thing≤ (Sk∙ ª Tel'≤ $1╕ i≤ includeΣ iεá $2░á due≤á fo≥ ì
  165. membershi≡á iεá thσá Centra∞ F╠ Astronomica∞ Society¼á Inc«á - iµá yo⌡á arσ ì
  166. interested║  contac⌠ CFA╙ o≥ Star-Ne⌠ b∙ sendinτ ß notσ t∩ Chucδ Cole).
  167.  
  168. .PAè.HE               EPHEMERIS FOR COMET HALLEY STARTING 3/1/1986
  169. .FO              Courtesy of STAR-NET at (305) 639-0715 by modem
  170. .op
  171. Comparinτá thi≤ inf∩ t∩ thσ table≤ abovσ fo≥ Decembe≥ o≥ Januar∙ show≤ tha⌠ ì
  172. brightnes≤ (lo≈ valuσ oµ "magntude"⌐ i≤ par⌠ oµ thσ rationalσ fo≥ thσá bes⌠ ì
  173. expectation≤á fo≥ seeinτ t∩ occu≥ iε thσ Sprinτ anΣ furthe≥ SoutΦ thaεá thσ ì
  174. Floridß Keys«á  ┴ differencσ oµ 1.░ iε maτ i≤ ß brightnes≤ rati∩ oµ 2.5¼ o≥ ì
  175. morσá thaεá onσ camerß ╞ stop«á  Onl∙ ß morσ detaileΣá examinatioεá oµá thσ ì
  176. coordinatσ datß wil∞ sho≈ thosσ no⌠ familia≥ witΦ celestia∞ chart≤ tha⌠ thσ ì
  177. come⌠á wil∞ bσ to∩ lo≈ oε thσ horizoε fo≥ decen⌠ viewinτ froφ point≤ iε thσ ì
  178. US┴á wheε i⌠ re-appear≤ iε Spring«á  Iε Apri∞ froφ thσá Floridßá Keys¼á thσ ì
  179. come⌠á wil∞á bσá withiε abou⌠ 3░ degree≤ abovσ thσ horizon¼á whicΦá i≤á thσ ì
  180. regioεá wherσá atmospheric≤á severel∙á limi⌠á contras⌠á anΣá definitioεá oµ ì
  181. celestia∞á objects«á  Seσá thσ filσ "HALLEY.TXTó fo≥ ou≥á solutioεá t∩á thσ ì
  182. observinτá problems¼á anΣá ß pleasurablσ escapσ tri≡ tha⌠á include≤á pokinτ ì
  183. arounΣ Mayaε ruin≤ anΣ islanΣ beaches....
  184.  
  185.  
  186.     PAGE  1     DAYS FROM    COORDINATES:        DISTANCES (AU):  PREDICTED
  187.        DATE     PERIHELION    RA       DEC        SUN    EARTH    MAGNITUDE
  188.    +----+----+----+----+----+----+----+----+----+----+----+----+----+----+
  189.      3/ 1/86        19       20:27   -16:21       0.73   1.26        3.5 
  190.      3/ 2/86        20       20:25   -16:43       0.74   1.24        3.5 
  191.      3/ 3/86        21       20:23   -17:06       0.75   1.21        3.5 
  192.      3/ 4/86        22       20:22   -17:29       0.77   1.19        3.5 
  193.      3/ 5/86        23       20:20   -17:51       0.78   1.17        3.6 
  194.      3/ 6/86        24       20:18   -18:15       0.79   1.14        3.5 
  195.      3/ 7/86        25       20:16   -18:41       0.81   1.12        3.6 
  196.      3/ 8/86        26       20:14   -19:07       0.82   1.10        3.6 
  197.      3/ 9/86        27       20:12   -19:34       0.83   1.07        3.6 
  198.      3/10/86        28       20:10   -20:02       0.85   1.05        3.6 
  199.      3/11/86        29       20:08   -20:32       0.86   1.02        3.6 
  200.      3/12/86        30       20:06   -21:02       0.88   1.00        3.6 
  201.      3/13/86        31       20:03   -21:34       0.89   0.97        3.6 
  202.      3/14/86        32       20:01   -22:08       0.91   0.95        3.6 
  203.      3/15/86        33       19:58   -22:43       0.92   0.92        3.6 
  204.      3/16/86        34       19:55   -23:20       0.94   0.90        3.6 
  205.      3/17/86        35       19:52   -23:59       0.95   0.87        3.6 
  206.      3/18/86        36       19:49   -24:40       0.97   0.85        3.6 
  207.      3/19/86        37       19:46   -25:23       0.98   0.82        3.6 
  208.      3/20/86        38       19:42   -26:09       1.00   0.79        3.5 
  209.      3/21/86        39       19:38   -26:57       1.01   0.77        3.5 
  210.      3/22/86        40       19:34   -27:48       1.03   0.74        3.5 
  211.      3/23/86        41       19:29   -28:42       1.04   0.72        3.5 
  212.      3/24/86        42       19:24   -29:40       1.06   0.69        3.4 
  213.      3/25/86        43       19:18   -30:41       1.07   0.67        3.4 
  214.      3/26/86        44       19:12   -31:46       1.09   0.64        3.4 
  215.      3/27/86        45       19:05   -32:54       1.11   0.62        3.4 
  216.      3/28/86        46       18:58   -34:06       1.12   0.59        3.3 
  217.      3/29/86        47       18:49   -35:22       1.14   0.57        3.3 
  218.      3/30/86        48       18:39   -36:42       1.15   0.54        3.2 
  219.      3/31/86        49       18:29   -37:00       1.17   0.52        3.1 
  220. .PAè    PAGE  2     DAYS FROM    COORDINATES:        DISTANCES (AU):  PREDICTED
  221.        DATE     PERIHELION    RA       DEC        SUN    EARTH    MAGNITUDE
  222.     +----+----+----+----+----+----+----+----+----+----+----+----+----+----+
  223.      4/ 1/86        50       18:17   -39:24       1.18   0.50        3.1 
  224.      4/ 2/86        51       18:04   -40:49       1.20   0.48        3.1 
  225.      4/ 3/86        52       17:48   -42:13       1.21   0.46        3 
  226.      4/ 4/86        53       17:31   -43:35       1.23   0.44        3 
  227.      4/ 5/86        54       17:12   -44:50       1.24   0.42        2.9 
  228.      4/ 6/86        55       16:50   -45:56       1.26   0.41        2.9 
  229.      4/ 7/86        56       16:27   -46:47       1.28   0.39        2.8 
  230.      4/ 8/86        57       16:02   -47:21       1.29   0.38        2.8 
  231.      4/ 9/86        58       15:36   -47:33       1.31   0.37        2.8 
  232.      4/10/86        59       15:09   -47:22       1.32   0.37        2.8 
  233.      4/11/86        60       14:42   -46:46       1.34   0.36        2.8 
  234.      4/12/86        61       14:16   -45:48       1.35   0.36        2.8 
  235.      4/13/86        62       13:52   -44:29       1.37   0.37        2.9 
  236.      4/14/86        63       13:30   -42:55       1.38   0.37        3 
  237.      4/15/86        64       13:10   -41:10       1.40   0.38        3.1 
  238.      4/16/86        65       12:51   -39:18       1.41   0.40        3.2 
  239.      4/17/86        66       12:35   -37:23       1.43   0.41        3.3 
  240.      4/18/86        67       12:21   -35:28       1.44   0.43        3.5 
  241.      4/19/86        68       12:08   -33:35       1.46   0.45        3.6 
  242.      4/20/86        69       11:57   -31:46       1.47   0.47        3.7 
  243.      4/21/86        70       11:48   -30:03       1.49   0.49        3.8 
  244.      4/22/86        71       11:39   -28:24       1.50   0.51        4 
  245.      4/23/86        72       11:31   -26:52       1.52   0.54        4.1 
  246.      4/24/86        73       11:24   -25:25       1.53   0.56        4.2 
  247.      4/25/86        74       11:18   -24:05       1.55   0.59        4.4 
  248.      4/26/86        75       11:13   -22:49       1.56   0.62        4.5 
  249.      4/27/86        76       11:08   -21:39       1.58   0.65        4.6 
  250.      4/28/86        77       11:03   -20:34       1.59   0.68        4.8 
  251.      4/29/86        78       10:59   -19:33       1.61   0.71        4.9 
  252.      4/30/86        79       10:56   -18:37       1.62   0.74        5 
  253.      5/ 1/86        80       10:53   -17:44       1.64   0.77        5.1 
  254.  
  255.  
  256.  
  257.  
  258. Note║ thσ coordinate≤ R┴ ª DE├ arσ celestia∞ coordinate≤ tha⌠ designatσ thσ ì
  259. positioεá iε thσ sk∙ relativσ t∩ thσ sta≥ field¼á no⌠ you≥ positioε oεá thσ ì
  260. earth«á  Usσá theφá b∙ comparisoε t∩ thσ coordinate≤ oµ somethinτá yo⌡á caε ì
  261. recognize«á  Thσ chart≤ iε Sk∙ ª Telescopσ magazinσ arσ exellen⌠ reference≤ ì
  262. t∩á aiΣá iε locatinτ thing≤ (Sk∙ ª Tel'≤ $1╕ i≤ includeΣ iεá $2░á due≤á fo≥ ì
  263. membershi≡á iεá thσá Centra∞ F╠ Astronomica∞ Society¼á Inc«á - iµá yo⌡á arσ ì
  264. interested║  contac⌠ CFA╙ o≥ Star-Ne⌠ b∙ sendinτ ß notσ t∩ Chucδ Cole).
  265. .PAè.PO 2
  266. .MT 6
  267. .HM 3
  268. .MB 4
  269. .FM 2
  270. .FO  Courtesy of Greg Walz-Chojnacki c/o STAR-NET @ (305) 639-0715 by modem
  271. .hσ                   Come⌠ HARTLEY-GOOD¼ froφ STAR-NET
  272. .op
  273.      Herσ i≤ thσ lates⌠ informatioε oε Come⌠ Hartle∙ GooΣ froφ thσá Centra∞ ì
  274. Burea⌡á fo≥ Astronomica∞ Telegrams«á Note¼á b∙ thσ way¼á tha⌠ thi≤ come⌠ i≤ ì
  275. morσá spectacula≥ thaε Halley'≤ througΦ earl∙ January¼á duσ t∩ placemen⌠ iε ì
  276. thσá sky«á  Thσá designatioε oµ Come⌠ Hartley-GooΣá i≤á 1985l«á An∙á futurσ ì
  277. upload≤á t∩ STAR-NE╘ oε thi≤ come⌠ wil∞ bσ nameΣ 1985l.DC° (wherσ ° i≤á thσ ì
  278. version¼ startinτ witΦ 3⌐ t∩ reflec⌠ ß nomenclaturσ correction.
  279.  
  280.      Thσ come⌠ i≤ movinτ swiftl∙ wes⌠ towarΣ thσ Sun«á  Whilσ thσ come⌠á i≤ ì
  281. expecteΣá t∩á attaiεá reacΦá ß tota∞ maginitudσ oµá 6.6¼á wheεá i⌠á reache≤ ì
  282. perihelioεá iε Ophiuchu≤ i⌠ wil∞ bσ to∩ closσ t∩ thσ Suε t∩ bσá seeεá well« ì
  283. Nevertheless¼á i⌠ shoulΣ bσ wortΦ viewinτ witΦ eveε modes⌠ telescopes«á  I⌠ ì
  284. wil∞á als∩á makσ ß reasonablσ photographiπ subject«á  Looδ fo≥á i⌠á througΦ ì
  285. earl∙ Decembe≥ iε thσ progressivel∙ earlie≥ eveninτ sky« 
  286.  
  287.      Belo≈á arσá thσ improveΣ paraboliπ orbita∞ elements¼á followeΣ b∙á thσ ì
  288. ephemeris«á ╔ woulΣ appreciatσ observersº report≤ oε thi≤á object«á  Pleasσ ì
  289. includσá sucΦ circumstance≤ a≤ time¼á date¼á altitudσ oµ comet¼á instrumen⌠ ì
  290. (aperturσ anΣ magnification)¼ etc«  Thanks.
  291.  
  292. T = 1985 Dec 9.092       w = 87.040 degrees (arg. of peri.)
  293.                          W = 357.702  "     (long. of asc. node)
  294. q= .69435                i = 79.897
  295.  
  296.  
  297.                Ephemeris for Comet Hartley-Good (epoch 1950)          
  298.                                                                   
  299.       DATE  |   r.a    |   dec.     |    Delta  |    R   | t. mag.
  300.       mm/dd |(hh mm.mm)| ( dd mm.m )|    (AU)   |   (AU)          
  301.       ______|__________|____________|___________|________|_______ 
  302.       9/22  | 00 14.21 |  -27.54.7  |    0.644  |  1.602 |   9.1  
  303.       9/27  | 23 33.81 |  -26 55.1  |           |        |        
  304.       10/2  | 22 46.43 |  -24 30.5  |    0.529  |  1.457 |   8.3  
  305.       10/7  | 21 56.19 |  -20.29.2  |           |        |        
  306.       10/12 | 21 08.60 |  -15 16.4  |    0.511  |  1.311 |   7.7  
  307.       10/17 | 20 27.53 |  -09 42.9  |           |        |        
  308.       10/22 | 19 54.03 |  -04 31.6  |    0.581  |  1.166 |   7.5  
  309.       10/27 | 19 27.18 |  -00 01.8  |           |        |        
  310.       11/01 | 19 05.47 |   03 44.6  |    0.699  |  1.026 |   7.3  
  311.       11/06 | 18 47.43 |   06 52.6  |           |        |        
  312.       11/11 | 18 31.84 |   09 28.0  |    0.828  |  0.896 |   7.1  
  313.       11/16 | 18 17.79 |   11 35.0  |           |        |        
  314.       11/21 | 18 04.56 |   13 15.8  |    0.948  |  0.787 |   6.8  
  315.       11/26 | 17 51.69 |   14 30.1  |           |        |        
  316.       12/01 | 17 38.95 |   15 16.8  |    1.044  |  0.714 |   6.6  
  317.       12/06 | 17 26.31 |   15 34.2  |           |        |        
  318.       12/11 | 17 13.93 |   15 21.9  |    1.106  |  0.695 |   6.6  
  319.       12/16 | 17 02.01 |   14 41.4  |           |        |        
  320.       12/21 | 16 50.70 |   13 35.7  |    1.127  |  0.736 |   6.9  
  321.       12/26 | 16 40.06 |   12 09.1  |           |        |        
  322.       12/31 | 16 29.98 |   10 25.6  |    1.109  |  0.825 |   7.4  
  323.       01/05 | 16 20.25 |   08 28.7  |           |        |        
  324.       01/10 | 16 10.57 |   06 20.7  |    1.061  |  0.944 |   7.9  
  325.       01/15 | 16 00.56 |   04 03.0  |           |        |        
  326.       01/20 | 15 49.79 |   01 35.8  |    0.991  |  1.078 |   8.3  
  327.       01/25 | 15 37.82 |  -01 01.0  |           |        |        
  328.       01/30 | 15 24.17 |  -03 47.8  |    0.913  |  1.221 |   8.7  
  329. .pa è