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Post Info TOPIC: Asteroid 15 Eunomia


L

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RE: Asteroid 15 Eunomia
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  (15) Eunomia
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5 Goffin
M 40.77241 (2000.0) P Q
n 0.22924719 Peri. 97.89697 +0.83665408 -0.51485950
a 2.6440319 Node 293.26767 +0.38713194 +0.79723420
e 0.1874178 Incl. 11.73823 +0.38747750 +0.31517825
P 4.30 H 5.28 G 0.23 U 0


Ephemeris
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 01 01 07 37.27 +23 40.0 1.471 2.440 167.5 5.0 8.4
2008 01 06 07 31.58 +23 26.2 1.470 2.450 173.8 2.5 8.3
2008 01 11 07 25.81 +23 11.4 1.476 2.460 178.7 0.5 8.2
2008 01 16 07 20.14 +22 55.7 1.490 2.470 173.2 2.7 8.4
2008 01 21 07 14.76 +22 39.2 1.511 2.480 167.0 5.1 8.5
2008 01 26 07 09.83 +22 22.0 1.539 2.490 160.8 7.5 8.7
2008 01 31 07 05.47 +22 04.5 1.573 2.500 154.8 9.7 8.8



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On 30th November , from 07:12 UT to 7:24 UT , the magnitude 9.1 asteroid (15) Eunomia occults the magnitude 10 star TYC 1930-01565-1 in the constellation Gemini.
The occultation should occur around 07:18 UT, and last 72 seconds, and be just visible as a half magnitude drop in brightness.
Visible in Alaska

TYC 1930-01565-1.kmz
Google Sky file (1kb, kmz)

TYC 1930-01565-1
Expand (9kb, 560 x 389)

Position(2000): RA 08h 00m 56.142s, Dec 24 59 31.81

As the largest S-type asteroid (with 3 Juno being a very close second), Eunomia has attracted a moderate amount of scientific attention. It contains slightly over one percent of the mass of the entire main belt.
Eunomia appears to be an elongated (330 x 245 x 205km) but fairly regularly shaped body, with what appear to be four sides of differing curvature and noticeably different average compositions. Its elongation led to the suggestion that Eunomia may be a binary object.

 Date UTC R.A Dec. Distance V.Mag 
h m s h m s o ' " au.
 2007-11-28T12:00: 0.00 8 1 19.23086 +25 4 35.3600 1.634756396 9.10  
2007-11-29T12:00: 0.00 8 1 7.15804 +25 1 48.5551 1.626696956 9.09
2007-11-30T12:00: 0.00 8 0 52.94450 +24 59 3.9132 1.618781456 9.07
2007-12-01T12:00: 0.00 8 0 36.58985 +24 56 21.3709 1.611014827 9.05
2007-12-02T12:00: 0.00 8 0 18.09627 +24 53 40.8556 1.603402079 9.03
2007-12-03T12:00: 0.00 7 59 57.46869 +24 51 2.2852 1.595948284 9.01
2007-12-04T12:00: 0.00 7 59 34.71481 +24 48 25.5689 1.588658550 8.99




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Asteroid 15 Eunomia at magnitude 8.4, is at opposition on the 29th July, 2006. The asteroid is best viewed from the southern hemisphere.
Eunomia is moving in a retrograde direction towards the west.

15Eunomia290706

15 Eunomia is a large asteroid in the inner main asteroid belt. It is the largest of the stony (S-type) asteroids, and somewhere between the 8th to 12th largest Main Belt asteroid overall (uncertainty in diameters causes uncertainty in its ranking). It is also the largest member of the Eunomia family of asteroids.
Eunomia was discovered by A. de Gasparis on July 29, 1851 and named after Eunomia, one of the Horae (Hours), a personification of order and law in Greek mythology.

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