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Post Info TOPIC: Comet 10P/Tempel 2


L

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RE: Comet 10P/Tempel 2
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The magnitude 9.3 comet 10P/Tempel 2 will pass 0.12° from the magnitude 12.4 galaxy NGC 50, in the constellation Cetus, at 8:00 UT, 11th July, 2010.

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L

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Comet 10P/Tempel 2 is at perihelion (1.423 AU) on the 4th July, 2010.

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L

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Ephemeris
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   Mag
2010 06 23 23 22.94 -06 50.2 0.807 1.428 102.5 44.0 8.4
2010 06 28 23 37.63 -06 48.5 0.784 1.425 103.9 43.8 8.3
2010 07 03 23 51.97 -06 52.5 0.762 1.423 105.3 43.6 8.2
2010 07 08 00 05.84 -07 02.8 0.742 1.423 107.0 43.1 8.2
2010 07 13 00 19.14 -07 19.8 0.725 1.425 108.7 42.5 8.1
2010 07 18 00 31.76 -07 43.5 0.709 1.429 110.6 41.7 8.1
2010 07 23 00 43.59 -08 14.0 0.696 1.435 112.7 40.8 8.1
2010 07 28 00 54.54 -08 51.2 0.684 1.443 114.9 39.6 8.2

										

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L

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The magnitude 9.4 comet, 10P/Tempel 2, will pass 0.29° from the magnitude 11.8 galaxy NGC 7721, in the constellation Aquarius, at 10:00 UT, 28th June, 2010.

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L

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Ephemeris
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   Mag
2010 05 04 20 52.19 -10 19.6 1.180 1.562 90.7 40.2 10.2
2010 05 09 21 06.86 -09 52.0 1.131 1.541 91.9 40.9 10.0
2010 05 14 21 21.70 -09 24.3 1.085 1.523 93.1 41.5 9.7
2010 05 19 21 36.68 -08 57.2 1.042 1.505 94.3 42.1 9.5
2010 05 24 21 51.79 -08 31.2 1.001 1.489 95.4 42.6 9.3
2010 05 29 22 07.00 -08 06.7 0.962 1.475 96.5 43.1 9.1


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L

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Ephemeris
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   mag
2010 03 05 18 10.91 -13 43.6 1.932 1.875 71.7 30.2 13.3
2010 03 10 18 23.33 -13 40.1 1.860 1.845 73.7 31.1 13.0
2010 03 15 18 35.93 -13 33.8 1.789 1.816 75.5 32.0 12.7
2010 03 20 18 48.70 -13 24.7 1.720 1.788 77.3 32.9 12.5
2010 03 25 19 01.66 -13 12.8 1.652 1.760 79.0 33.8 12.2
2010 03 30 19 14.80 -12 58.4 1.586 1.732 80.7 34.7 12.0


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L

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When professional astronomers study a comet carefully enough and they are patient enough to do so every chance they get, the results can be astonishing. This type of result is just what Lowell Observatory astronomers and colleagues have with research on Comet 10P/Tempel 2. Lowell astronomer David Schleicher led a team that made the best measurement of the comet's rotation period, showing that the rotation period of Tempel 2's nucleus has lengthened, or the comet has slowed down, by about 10 seconds every five years.

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