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956 Elisa (A921 PE)
Classification: Main-belt Asteroid          SPK-ID: 2000956
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2045943432486228 2.9941e-08  
a 2.298403817830512 5.4466e-09 au
q 1.828163398201351 6.8511e-08 au
i 5.962588135802346 3.3513e-06 deg
node 192.6385587106473 3.3286e-05 deg
peri 125.3638194512315 3.4247e-05 deg
M 136.2003207029584 9.2164e-06 deg
tp 2458518.980856451907
(2019-Feb-04.48085645)
3.1874e-05 TDB
period 1272.734827514603
3.48
4.5241e-06
1.239e-08
d
yr
n .28285546385417 1.0054e-09 deg/d
Q 2.768644237459672 6.561e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3045  
   data-arc span      36259 days (99.27 yr)  
   first obs. used      1921-08-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43266  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:57:21  

Additional Information
 Earth MOID = .823196 au 
 Jupiter MOID = 2.56348 au 
 T_jup = 3.558 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1   n/a MPO435704  
diameter diameter 10.474 km 0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.492 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Benishek, V.; Protitch-Benishek, V. (2009) Minor Planet Bull. 36, 35-37.]
[Lim, L.F.; Emery, J.P.; Moskovitz, N.A. (2011) Icarus 213, 510-523.]
geometric albedo albedo 0.147   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

956 Elisa (A921 PE)          Discovered 1921-Aug-08 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A921 PE = 1959 NB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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