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580 Selene (A905 YB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000580
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08665037200058803 3.1673e-08  
a 3.2266536924756 1.3516e-08 au
q 2.947062949705518 1.0821e-07 au
i 3.671278017474521 3.3045e-06 deg
node 98.91281697913986 6.1699e-05 deg
peri 338.5381294805269 6.5719e-05 deg
M 278.6523604326132 2.2616e-05 deg
tp 2459478.876036568014
(2021-Sep-21.37603657)
0.00013339 TDB
period 2117.029751328248
5.80
1.3302e-05
3.642e-08
d
yr
n .1700495705240476 1.0684e-09 deg/d
Q 3.506244435245681 1.4687e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3125  
   data-arc span      41973 days (114.92 yr)  
   first obs. used      1905-12-17  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40259  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:54:37  

Additional Information
 Earth MOID = 1.9629 au 
 Jupiter MOID = 1.70012 au 
 T_jup = 3.178 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.2   n/a MPO435700  
diameter diameter 48.204 km 0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.47 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.082   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

580 Selene (A905 YB)          Discovered 1905-Dec-17 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A905 YB = 1950 RQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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