* Astronomy

Blobrana · L

RE: Pallas

Blobrana · L

Astronomers examining one of the solar system's largest asteroids with the Hubble Space Telescope have dubbed it a "protoplanet."
Pallas, an asteroid 265 kilometres in diameter and located in the asteroid belt between Mars and Jupiter, joins two other asteroids, Ceres and Vesta, which are also considered protoplanets.
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Blobrana · L

On the 12th September, 2009, the asteroid Pallas will be at opposition.
The asteroid will brighten to magnitude 8.6 in constellation Leo.

Ephemeris

Date       UT      R.A. (J2000) Decl.    Delta     r     El.    Ph.   V  
            h m s                                                           
2009 09 01 000000 10 58 13.8 +03 27 07   3.242   2.243    6.5   2.9   8.8    
2009 09 02 000000 11 00 12.4 +03 22 55   3.245   2.244    6.1   2.7   8.7    
2009 09 03 000000 11 02 10.7 +03 18 41   3.248   2.246    5.6   2.5   8.7    
2009 09 04 000000 11 04 09.0 +03 14 26   3.250   2.248    5.1   2.3   8.7    
2009 09 05 000000 11 06 07.1 +03 10 09   3.253   2.249    4.6   2.1   8.7    
2009 09 06 000000 11 08 05.0 +03 05 50   3.255   2.251    4.1   1.8   8.7    
2009 09 07 000000 11 10 02.8 +03 01 30   3.258   2.253    3.6   1.6   8.7    
2009 09 08 000000 11 12 00.5 +02 57 09   3.260   2.255    3.2   1.4   8.7    
2009 09 09 000000 11 13 58.1 +02 52 46   3.262   2.256    2.7   1.2   8.6    
2009 09 10 000000 11 15 55.5 +02 48 22   3.264   2.258    2.3   1.0   8.6   
2009 09 11 000000 11 17 52.8 +02 43 57   3.266   2.260    1.9   0.9   8.6    
2009 09 12 000000 11 19 49.9 +02 39 31   3.267   2.261    1.6   0.7   8.6    
2009 09 13 000000 11 21 46.9 +02 35 04   3.269   2.263    1.4   0.6   8.6    
2009 09 14 000000 11 23 43.8 +02 30 36   3.271   2.265    1.4   0.6   8.6    
2009 09 15 000000 11 25 40.5 +02 26 08   3.272   2.267    1.5   0.7   8.6    
2009 09 16 000000 11 27 37.1 +02 21 39   3.273   2.269    1.8   0.8   8.6    
2009 09 17 000000 11 29 33.6 +02 17 09   3.275   2.270    2.2   1.0   8.6    
2009 09 18 000000 11 31 30.0 +02 12 39   3.276   2.272    2.6   1.2   8.7    
2009 09 19 000000 11 33 26.2 +02 08 08   3.277   2.274    3.1   1.4   8.7    
2009 09 20 000000 11 35 22.3 +02 03 38   3.277   2.276    3.6   1.6   8.7    
2009 09 21 000000 11 37 18.2 +01 59 07   3.278   2.278    4.0   1.8   8.7   
2009 09 22 000000 11 39 14.0 +01 54 36   3.279   2.280    4.5   2.0   8.7    
2009 09 23 000000 11 41 09.7 +01 50 05   3.279   2.281    5.0   2.2   8.8    
2009 09 24 000000 11 43 05.2 +01 45 35   3.280   2.283    5.5   2.4   8.8    
2009 09 25 000000 11 45 00.6 +01 41 04   3.280   2.285    6.0   2.6   8.8    
2009 09 26 000000 11 46 55.8 +01 36 35   3.280   2.287    6.6   2.9   8.8   
2009 09 27 000000 11 48 50.9 +01 32 05   3.280   2.289    7.1   3.1   8.8    
2009 09 28 000000 11 50 45.8 +01 27 36   3.280   2.291    7.6   3.3   8.9   
2009 09 29 000000 11 52 40.7 +01 23 08   3.280   2.293    8.1   3.5   8.9      
2009 09 30 000000 11 54 35.3 +01 18 41   3.280   2.295    8.6   3.8   8.9

Blobrana · L

Expand (47kb, 548 x 296)
Credit: from Britney Schmidt's presentation to the 2008 DPS meeting

Images of Pallas from the Hubble Space Telescope
These two sets of images were taken through different filters on the Hubble Space Telescope's Wide Field and Planetary Camera 2: an ultraviolet filter (top) and blue filter (bottom). They cover most of a rotation of Pallas, and reveal that it has an irregular shape and probably has some patchy albedo variations. In these images, we are looking at the southern hemisphere of Pallas, with the images centered at about 30 degrees south.

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Blobrana · L

2 Pallas (Greek ) is an asteroid located in the asteroid belt region of the solar system and was the second to be discovered. It was found and named by astronomer Heinrich Wilhelm Matthäus Olbers on March 28, 1802.

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Orbital Elements at Epoch 2454200.5 (2007-Apr-10.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	0.230758828172558	3.0294e-08
a	2.77166846462974	2.4296e-09	AU
q	2.13208149764895	8.4304e-08	AU
i	34.841828581513	3.6884e-06	deg
node	173.1358033133696	4.9019e-06	deg
peri	310.3448192659582	8.2519e-06	deg
M	199.7261206001518	7.168e-06	deg
t_p	2454950.861591773256 (2009-Apr-29.36159178)	3.3864e-05	JED
period	1685.428555481935 4.61	2.2161e-06 6.067e-09	d yr
n	.2135955266861257	2.8085e-10	deg/d
Q	3.411255431610538	2.9903e-09	AU

Asteroid 2 Pallas has just passed opposition and is currently at magnitude 8.8 in the constellation Aquarius.

2007-Sep-04 00:00      22 25 56.94 +04 00 45.9   8.83   
 2007-Sep-05 00:00     22 25 11.78 +03 48 16.5   8.83   
 2007-Sep-06 00:00     22 24 26.81 +03 35 41.3   8.83   
 2007-Sep-07 00:00     22 23 42.07 +03 23 01.0   8.84   
 2007-Sep-08 00:00     22 22 57.61 +03 10 16.0   8.84   
 2007-Sep-09 00:00     22 22 13.48 +02 57 26.8   8.85   
 2007-Sep-10 00:00     22 21 29.72 +02 44 33.9   8.86

Pallas.kmz
Google Sky file

-- Edited by Blobrana at 16:02, 2008-01-12