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Post Info TOPIC: Comet 103P/Hartley 2


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RE: Comet 103P/Hartley 2
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A comet known as Comet 103P/Hartley 2 is going to appear closest to Earth on Wednesday October 20.
According to the Yemeni astronomer, Ahmed M. al-Joubi, the Hartley 2 comet will appear in the sky above Sanaa at 8:33 PM, Sanaa Time, with a distance estimated by 18,081,606.7 kilometres. The source mentioned that the comet will pass Sanaa from the northern east side by 8:33 PM on October 20, and will vanish in the Western north by 10:35 am on October 21.

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Comet Hartley 2 Visible in Night Sky

Backyard stargazers with a telescope or binoculars and a clear night's sky can now inspect the comet that in a little over two weeks will become only the fifth in history to be imaged close up. Comet Hartley 2 will come within 17.7 million kilometres of Earth this Wed., Oct. 20 at noon PDT (3 p.m. EDT). NASA's EPOXI mission will come within 700 kilometres of Hartley 2 on Nov. 4.
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Comet Hartley 2
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Comet Hartley 2 will pass the star Epsilon Aurigae tonight.

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RE: Comet 103P/Hartley 2
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On 20 October 2010, Comet Hartley 2 (103P/Hartley) will pass within about 11 million miles (0.12 AU) of the Earth. This will be its closest approach since it was discovered in 1986, and one of the closest approaches of any comet in the last few hundred years. At this time, the comet should be visible in the constellation Auriga.
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Comet 103P (Hartley)
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MPEC 2010 - S39

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RE: Comet 103P/Hartley 2
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Deep Impact Spacecraft Eyes Comet Target

On Sunday, Sept. 5, NASA's Deep Impact spacecraft beamed down the first of more than 64,000 images it's expected to take of Comet Hartley 2. The spacecraft, now on an extended mission known as EPOXI, has an appointment with the comet on Nov. 4, 2010.
It will use all three of the spacecraft's instruments (two telescopes with digital colour cameras and an infrared spectrometer) to scrutinize Hartley 2 for more than two months.

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Comet 103P (Hartley) in the constellation Pegasus, 23:25UT, 3rd August, 2010.

Magnitude=11.4mag
Best seen from 23.4h - 3.0h
RA=22h29m53 Dec=+2457.4' (J2000)
Distance to Sun= 1.54AU
Distance to Earth= 0.67AU
Elongation=132
hourly motion: dRA= 21.7"/h dDec= 62.8"/h

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Ephemeris
 Date__(UT)__HR:MN     R.A._(ICRF/J2000.0)_DEC  T-mag  N-mag
2010-Jul-14 00:00 22 15 07.84 +16 49 17.1 14.19 18.61
2010-Jul-15 00:00 22 15 54.77 +17 10 54.9 14.14 18.57
2010-Jul-16 00:00 22 16 41.18 +17 32 42.5 14.08 18.52
2010-Jul-17 00:00 22 17 27.07 +17 54 40.1 14.03 18.48
2010-Jul-18 00:00 22 18 12.46 +18 16 47.7 13.98 18.43
2010-Jul-19 00:00 22 18 57.36 +18 39 05.5 13.92 18.39
2010-Jul-20 00:00 22 19 41.76 +19 01 33.4 13.87 18.34
2010-Jul-21 00:00 22 20 25.69 +19 24 11.6 13.81 18.30
2010-Jul-22 00:00 22 21 09.16 +19 47 00.2 13.76 18.25
2010-Jul-23 00:00 22 21 52.16 +20 09 59.0 13.70 18.21
2010-Jul-24 00:00 22 22 34.72 +20 33 08.3 13.65 18.16
2010-Jul-25 00:00 22 23 16.84 +20 56 28.1 13.59 18.12
2010-Jul-26 00:00 22 23 58.53 +21 19 58.3 13.54 18.07
2010-Jul-27 00:00 22 24 39.80 +21 43 39.0 13.48 18.02
2010-Jul-28 00:00 22 25 20.67 +22 07 30.2 13.42 17.98
2010-Jul-29 00:00 22 26 01.14 +22 31 32.0 13.37 17.93
2010-Jul-30 00:00 22 26 41.24 +22 55 44.2 13.31 17.88
2010-Jul-31 00:00 22 27 20.98 +23 20 06.9 13.25 17.83
2010-Aug-01 00:00 22 28 00.38 +23 44 40.1 13.19 17.79
2010-Aug-02 00:00 22 28 39.45 +24 09 23.7 13.13 17.74
2010-Aug-03 00:00 22 29 18.22 +24 34 17.7 13.08 17.69
2010-Aug-04 00:00 22 29 56.72 +24 59 22.0 13.02 17.65
2010-Aug-05 00:00 22 30 34.97 +25 24 36.7 12.96 17.60
2010-Aug-06 00:00 22 31 13.01 +25 50 01.5 12.90 17.55
2010-Aug-07 00:00 22 31 50.88 +26 15 36.5 12.84 17.50
2010-Aug-08 00:00 22 32 28.61 +26 41 21.6 12.78 17.45
2010-Aug-09 00:00 22 33 06.26 +27 07 16.7 12.72 17.41
2010-Aug-10 00:00 22 33 43.88 +27 33 21.9 12.66 17.36
2010-Aug-11 00:00 22 34 21.54 +27 59 37.1 12.59 17.31
2010-Aug-12 00:00 22 34 59.31 +28 26 02.3 12.53 17.26
2010-Aug-13 00:00 22 35 37.26 +28 52 37.6 12.47 17.21
2010-Aug-14 00:00 22 36 15.48 +29 19 23.2 12.41 17.16
2010-Aug-15 00:00 22 36 54.05 +29 46 19.1 12.35 17.11
2010-Aug-16 00:00 22 37 33.06 +30 13 25.6 12.28 17.07
2010-Aug-17 00:00 22 38 12.62 +30 40 42.7 12.22 17.02
2010-Aug-18 00:00 22 38 52.81 +31 08 10.7 12.16 16.97
2010-Aug-19 00:00 22 39 33.75 +31 35 49.7 12.09 16.92
2010-Aug-20 00:00 22 40 15.55 +32 03 40.1 12.03 16.87
2010-Aug-21 00:00 22 40 58.32 +32 31 41.9 11.97 16.82
2010-Aug-22 00:00 22 41 42.20 +32 59 55.4 11.90 16.77
2010-Aug-23 00:00 22 42 27.32 +33 28 20.9 11.84 16.72
2010-Aug-24 00:00 22 43 13.83 +33 56 58.6 11.77 16.68
2010-Aug-25 00:00 22 44 01.87 +34 25 48.8 11.71 16.63
2010-Aug-26 00:00 22 44 51.61 +34 54 51.8 11.64 16.58
2010-Aug-27 00:00 22 45 43.24 +35 24 07.8 11.57 16.53
2010-Aug-28 00:00 22 46 36.95 +35 53 37.2 11.51 16.48
2010-Aug-29 00:00 22 47 32.94 +36 23 20.3 11.44 16.43
2010-Aug-30 00:00 22 48 31.45 +36 53 17.4 11.37 16.38


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The 1600 metre wide comet 103P/Hartley 2 will make a close pass (47.0 lunar distances, 0.1209 AU), travelling at 11.88 km/second, to the Earth-Moon system on the 20th October, 2010 @ 17:28 UT.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).


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Jupiter-family comet Hartley 2, officially designated 103P/Hartley is a small periodic comet with an orbital period of 6.46 years. It was discovered by Malcolm Hartley in 1986 at the Schmidt Telescope Unit in Siding Spring, Australia. Its diameter is estimated to be 1.2 to 1.6 km.
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