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Post Info TOPIC: Comet P/2010 A2 (LINEAR)
Blobrana


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RE: Comet P/2010 A2 (LINEAR)
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Astronomers would be expected to recognize comets easily when they see them, not least because of the objects' bright tails. But when planetary accidents try to fool them, their job is no longer that simple.
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Blobrana


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Comet P/2010 A2, an Activated Asteroid from the Main Asteroid Belt

Comet-like object P/2010 A2 was discovered by the LINEAR survey on January 6, 2010. Service observations carried out using ACAM on the William Herschel Telescope on January 21, 2010, show an asteroidal nucleus detached from the dust tail. Owing to its orbital parameters and its cometary appearance, the object is classified as a main-belt comet, in other words, an activated asteroid from the main asteroid belt. Comet P/2010 A2's orbit is the nearest to the Sun known so far, for this kind of object (semi-major axis of 2.29 AU).
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Blobrana


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Title: Water-ice driven activity on Main-Belt Comet P/2010 A2 (LINEAR) ?
Authors: F. Moreno, J. Licandro, G.-P. Tozzi, J.L. Ortiz, A. Cabrera-Lavers, T. Augusteijn, T. Liimets, J.E. Lindberg, T. Pursimo, P. Rodriguez-Gil, O. Vaduvescu

The dust ejecta of Main-Belt Comet P/2010 A2 (LINEAR) have been observed with several telescopes at the at the Observatorio del Roque de los Muchachos on La Palma, Spain. Application of an inverse dust tail Monte Carlo method to the images of the dust ejecta from the object indicates that a sustained, likely water-ice driven, activity over some eight months is the mechanism responsible for the formation of the observed tail. The total amount of dust released is estimated to be 5E7 kg, which represents about 0.3% of the nucleus mass. While the event could have been triggered by a collision, this cannot be decided from the currently available data.

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Blobrana


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Orbital elements:
    P/2010 A2 (LINEAR)
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 4.67084 TT                                  MPC
q   2.0058793            (2000.0)            P               Q
n   0.28430088     Peri.  133.22104     -0.06300038     -0.99629454
a   2.2906070      Node   320.27856     +0.88705057     -0.02901437
e   0.1243023      Incl.    5.25682     +0.45735353     -0.08096519
P   3.47

MPEC 2010 - F16

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Blobrana


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Orbital elements:
    P/2010 A2 (LINEAR)
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 4.39800 TT                                  MPC
q   2.0057959            (2000.0)            P               Q
n   0.28431891     Peri.  133.12101     -0.06125097     -0.99640351
a   2.2905101      Node   320.27799     +0.88709984     -0.02745593
e   0.1243017      Incl.    5.25692     +0.45749557     -0.08016368
P   3.47
From 89 observations 2010 Jan. 6-Mar. 9

MPEC 2010 - E50

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Blobrana


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Orbital elements:
    P/2010 A2 (LINEAR)
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 4.10957 TT                                  MPC
q   2.0052909            (2000.0)            P               Q
n   0.28436727     Peri.  133.00264     -0.05932386     -0.99652195
a   2.2902504      Node   320.28565     +0.88715902     -0.02575611
e   0.1244229      Incl.    5.25495     +0.45763473     -0.07925046
P   3.47
From 92 observations 2010 Jan. 6-Mar. 5

MPEC 2010 - E18

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Blobrana


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Posts: 131433
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Orbital elements:
    P/2010 A2 (LINEAR)
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 4.96458 TT                                  MPC
q   2.0051870            (2000.0)            P               Q
n   0.28439177     Peri.  133.30715     -0.06475376     -0.99618570
a   2.2901189      Node   320.29347     +0.88701309     -0.03060648
e   0.1244180      Incl.    5.25297     +0.45718129     -0.08171467
P   3.47
From 88 observations 2010 Jan. 6-Feb. 21

MPEC 2010 - D88

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Blobrana


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While scientists don't think it's a comet, they're not exactly sure of the precise origin of the incredible object soaring some 90 million miles from Earth, snapped just a few weeks ago by the Hubble Space Telescope.
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Blobrana


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Date:
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Orbital elements:
    P/2010 A2 (LINEAR)
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 4.90081 TT                                  MPC
q   2.0056319            (2000.0)            P               Q
n   0.28433447     Peri.  133.30063     -0.06442301     -0.99620440
a   2.2904266      Node   320.28084     +0.88701314     -0.03028855
e   0.1243413      Incl.    5.25578     +0.45722791     -0.08160514
P   3.47
From 87 observations 2010 Jan. 6-Feb. 19

MPEC 2010 - D64

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Blobrana


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Posts: 131433
Date:
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Orbital elements:
    P/2010 A2 (LINEAR)
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 3.87659 TT                                  MPC
q   2.0079460            (2000.0)            P               Q
n   0.28405968     Peri.  133.01076     -0.05830992     -0.99656677
a   2.2919035      Node   320.21852     +0.88712732     -0.02472555
e   0.1238959      Incl.    5.27048     +0.45782646     -0.07901469
P   3.47
From 85 observations 2010 Jan. 6-Feb. 7

MPEC 2010 - C30

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