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2650 Elinor (1931 EG)
Classification: Main-belt Asteroid          SPK-ID: 2002650
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .197117786458847 4.474e-08  
a 2.636778858685513 1.1718e-08 au
q 2.11702284667994 1.1759e-07 au
i 13.92030166165663 5.2648e-06 deg
node 332.3436720561324 1.762e-05 deg
peri 23.65171324041342 2.1266e-05 deg
M 100.9189175267268 1.3535e-05 deg
tp 2458562.091393254627
(2019-Mar-19.59139325)
5.7889e-05 TDB
period 1563.900032781625
4.28
1.0425e-05
2.854e-08
d
yr
n .2301937415780262 1.5345e-09 deg/d
Q 3.156534870691086 1.4028e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2102  
   data-arc span      32566 days (89.16 yr)  
   first obs. used      1931-02-25  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39125  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:43:07  

Additional Information
 Earth MOID = 1.11805 au 
 Jupiter MOID = 2.29879 au 
 T_jup = 3.328 
[ 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 11.1   n/a MPO416736  
diameter diameter 12.538 km 0.641 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.762 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pligge, Z.; Hall, B.; Ditteon, R. (2011) Minor Planet Bull. 38, 137-138.]
[Stephens, R.D. (2011) Minor Planet Bull. 38, 23-24.]
geometric albedo albedo 0.238   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2650 Elinor (1931 EG)          Discovered 1931-Mar-14 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 EG = 1931 DF = 1933 SX = 1937 PJ = 1950 RJ1 = 1950 RN = 1950 SO = 1950 TQ4 = 1954 NG = 1978 EF6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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