Comet 81/P WIld
Comet 81/P Wild

Comet Wild 2 is a short periodic comet with an orbital period of 6 years. Before its close encounter with Jupiter during September 1974 his orbit was almost circular and had a 43 year period. But the gravitational pull of the giant gas planet made Wild 2 to a member of the inner solar system. In 2004 the comet was target of the NASA mission "Stardust", which took samples of the coma and returned them back to earth. Our image was obtained during a trip to southern france in February 2010 and shows a nice 1 degree long tail.

AstronomyCast

Astronomy Cast

Astronomy Cast takes a fact based journey through the cosmos as it offers listeners weekly discussions on astronomical topics ranging from planets to cosmology.

Astrometric Summary

The tables below show the time spent observing minor planets for each month of the year. A night is counted as used when at least one triplet of images was acquired. An exceptional good month was April 2007 when 15 clear nights were recorded.

Year Positions
sent to MPC
Nights
used 
Total number
images taken 
Total exp.
time (min.) 
Avg exp.
time (s) 
Resid. RA Resid. DEC
2011 499 32 14613 6791,2 27.9 +0.06 ±0.46 -0.16 ±0.47
2010 580 41 15383 7001,4 27,3 +0.00 ±0.46 -0.11 ±0.49
2009 835 71 16181 6805,9 25,2 +0.08 ±0.43 -0.13 ±0.46
2008 515 52 13923 5594,4 24,1 -0.03 ±0.43 -0.08 ±0.47
2007 664 71 12998 5042,8 23,3 -0.03 ±0.43 -0.09 ±0.40
2006 234 26 5619 2765,6 29,5 +0.13 ±0.50 -0.21 ±0.51
2005 206 26 3974 2710,8 40,9 +0.21 ±0.78 -0.11 ±0.51
2004 90 15 4203 2065,7 29,5 -0.11 ±0.52 -0.16 ±0.48
2003 67 10 -- -- -- -0.08 ±0.51 +0.08 ±0.61
Total 3191 342 ´82281 619,2 h

 

 

Nights used by month
Year Jan. Feb. March April May June July August Sept. Octob. Nov. Dec. Total
2011 2 0 12 6 10 2
2010 0 0 7 7 0 3 6 5 6 6 1 0 41
2009 7 3 8 8 3 2 4 13 9 8 3 3 71
2008 3 8 3 0 9 4 7 4 2 4 2 6 52
2007 0 1 5 15 7 6 6 7 6 7 6 5 71
2006 5 0 0 3 0 0 0 2 6 5 2 3 26
2005 3 0 0 4 5 4 2 0 0 5 2 1 26
2004 2 2 6 4 0 0 0 0 1 0 0 0 15
2003 0 0 0 0 0 0 0 0 4 1 0 5 10

 

Positons measured by month
Year Jan. Feb. March April May June July August Sept. Oct. Nov. Dec. Total
2011 28 0 203 130 138
2010 0 0 77 99 0 12 51 53 96 177 15 0 580
2009 80 82 106 83 15 19 19 141 146 105 30 9 835
2008 28 100 20 0 46 38 48 35 16 67 18 99 515
2007 0 6 25 186 59 44 62 48 61 81 61 31 664
2006 58 0 0 10 0 0 0 18 55 45 15 33 234
2005 14 0 0 27 1 14 8 0 0 87 19 16 206
2004 15 11 44 18 0 0 0 0 2 0 0 0 90
2003 0 0 0 0 0 0 0 0 29 6 0 32 67