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Post Info TOPIC: Asteroid (596) Scheila


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RE: Asteroid (596) Scheila
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UA Catalina Sky Survey Discovers Possible Extinct Comet

The extraterrestrial rock is tumbling through space alongside thousands of similar objects in our solar system's main asteroid belt, roughly between the orbits of Mars and Jupiter.
An asteroid discovered more than 100 years ago my not be an asteroid at all, but an extinct comet that is coming back to life, according to new observations.

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(596) Scheila in apparent outburst

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On December 11.4, 2010, the Catalina Sky Survey detected asteroid Scheila mimicking a main-belt comet and displaying a "coma" of about magnitude 13.5. Scheila's coma may be the result of cometary outgassing or an asteroid impact as happened with P/2010 A2 . Archived Catalina images suggest that this outburst may have started around December 3, 2010.
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Ephemeris
Date       UT      R.A. (J2000) Decl.    Delta     r     El.    Ph.   V      
2010 12 12 000000 09 58 19.8 +28 08 47 2.537 3.108 116.8 16.4 14.3
2010 12 13 000000 09 58 35.5 +28 14 16 2.523 3.107 117.8 16.3 14.2
2010 12 14 000000 09 58 49.8 +28 19 53 2.510 3.105 118.7 16.1 14.2
2010 12 15 000000 09 59 02.7 +28 25 37 2.496 3.104 119.7 16.0 14.2
2010 12 16 000000 09 59 14.2 +28 31 30 2.483 3.102 120.6 15.8 14.2
2010 12 17 000000 09 59 24.3 +28 37 31 2.470 3.101 121.6 15.7 14.2
2010 12 18 000000 09 59 32.9 +28 43 39 2.457 3.099 122.5 15.5 14.2
2010 12 19 000000 09 59 40.1 +28 49 55 2.444 3.098 123.5 15.4 14.1
2010 12 20 000000 09 59 45.7 +28 56 19 2.432 3.096 124.4 15.2 14.1
2010 12 21 000000 09 59 50.0 +29 02 51 2.419 3.095 125.4 15.0 14.1
2010 12 22 000000 09 59 52.7 +29 09 29 2.407 3.093 126.4 14.8 14.1
2010 12 23 000000 09 59 53.9 +29 16 15 2.395 3.092 127.3 14.7 14.1
2010 12 24 000000 09 59 53.5 +29 23 08 2.383 3.090 128.3 14.5 14.1
2010 12 25 000000 09 59 51.7 +29 30 08 2.371 3.089 129.3 14.3 14.0
2010 12 26 000000 09 59 48.3 +29 37 15 2.359 3.087 130.3 14.1 14.0
2010 12 27 000000 09 59 43.3 +29 44 28 2.348 3.086 131.2 13.9 14.0
2010 12 28 000000 09 59 36.8 +29 51 48 2.336 3.084 132.2 13.7 14.0
2010 12 29 000000 09 59 28.7 +29 59 14 2.325 3.083 133.2 13.4 14.0
2010 12 30 000000 09 59 19.0 +30 06 46 2.314 3.081 134.2 13.2 13.9
2010 12 31 000000 09 59 07.8 +30 14 23 2.304 3.080 135.2 13.0 13.9
2011 01 01 000000 09 58 54.9 +30 22 06 2.293 3.078 136.1 12.8 13.9



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According to CBET 2583 minor planet (596) Scheila reveals an obvious cometary feature firstly noted by S. Larson,
Lunar and Planetary Laboratory (LPL), University of Arizona; he reports that images of the main-belt minor planet (596), taken on Dec. 11.44-11.47 UT
with the 0.68-m f/1.8 Schmidt telescope at Catalina, show the object to be in apparent outburst with a comet-like appearance.

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(596) Scheila 

Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 Goffin

M 268.25628 (2000.0) P Q

n 0.19678209 Peri. 175.87721 -0.39508010 +0.88704083 T = 2456066.71985 JDT

a 2.9273793 Node 70.71395 -0.84991453 -0.25424935 q = 2.4439669

e 0.1651349 Incl. 14.66087 -0.34865025 -0.38537751

P 5.01 H 8.90 G 0.15 U 0


From 549 observations at 41 oppositions, 1908-2005


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Observers have announced the discovery of a spiral like tail around the main belt asteroid (596) Scheila.

CBET 2583 (Subscription )

Asteroid (596) Scheila is an asteroid, a minor planet orbiting the Sun.
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Lightcurve (2.85kb, PDF)

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