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| Orbit Diagram
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| Note:
Make sure you have Java enabled on your browser to see the applet.
This applet is provided as a 3D orbit visualization tool.
The applet was implemented using 2-body methods,
and hence should not be used for determining accurate long-term trajectories
(over several years or decades) or planetary encounter circumstances.
For accurate long-term ephemerides, please instead use our Horizons system. |
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Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.
Orbit Viewer applet originally written and kindly provided by
Osamu Ajiki (AstroArts),
and further modified by
Ron Baalke (JPL).
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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .3897123428389667 | 6.3651e-08 | |
| a | 2.608463628082062 | 9.4429e-09 | AU |
| q | 1.591913156371971 | 1.6699e-07 | AU |
| i | 24.99523276828985 | 6.9286e-06 | deg |
| node | 258.4377767572292 | 1.4766e-05 | deg |
| peri | 255.1647943883137 | 1.7186e-05 | deg |
| M | 117.4325907479093 | 1.2307e-05 | deg |
| tp | 2455898.548511564720
(2011-Dec-03.04851156) | 5.0849e-05 | JED |
| period | 1538.776711693366
4.21 | 8.3558e-06
2.288e-08 | d
yr |
| n | .2339520719700999 | 1.2704e-09 | deg/d |
| Q | 3.625014099792154 | 1.3123e-08 | AU |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.21 |
mag |
n/a |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 13 |
| diameter |
diameter |
42.87 |
km |
1.6 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 13 |
| rotation period |
rot_per |
5.1684 |
h |
n/a |
Asteroid Lightcurve DataBase (Rev. 2013-May-01) |
Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Science XXVI, 1511-1512.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2006) IAU 2006, poster paper.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[McDonald, D. (2012) Minor Planet Bul. 39, 105.] |
| geometric albedo |
albedo |
0.1990 |
|
0.015 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 13 |
| B-V |
BV |
.673 |
mag |
.024 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 |
#obs=5; phase (min.=7.45, mean=12.34, max.=27.24) deg. |
| U-B |
UB |
.188 |
mag |
.043 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 |
#obs=5; phase (min.=7.45, mean=16.08, max.=27.24) deg. |
| Tholen spectral type |
spec_T |
M |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Xe |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
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| 132 Aethra Discovered 1873-Jun-13 by Watson, J. C. at Ann Arbor |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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Alternate Designations
| 1949 MD = 1953 LF = A922 XB |
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