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JPL Small-Body Database Browser
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889 Erynia (A918 EN)
Classification: Main-belt Asteroid          SPK-ID: 2000889
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2029055964637966 3.8687e-08  
a 2.446432985617125 8.2574e-09 au
q 1.950038041461776 9.5057e-08 au
i 8.106436289841287 4.0695e-06 deg
node 132.53321528 3.1824e-05 deg
peri 278.5203718630979 3.3254e-05 deg
M 342.6237330909469 1.0853e-05 deg
tp 2459067.960940366935
(2020-Aug-06.46094037)
4.2235e-05 TDB
period 1397.649947437409
3.83
7.0762e-06
1.937e-08
d
yr
n .257575225227218 1.3041e-09 deg/d
Q 2.942827929772475 9.9328e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2371  
   data-arc span      37187 days (101.81 yr)  
   first obs. used      1918-03-05  
   last obs. used      2019-12-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45316  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:39:51  

Additional Information
 Earth MOID = .980352 au 
 Jupiter MOID = 2.47006 au 
 T_jup = 3.456 
[ 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 11.0   n/a MPO452170  
diameter diameter 16.682 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.89 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) 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.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.230   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

889 Erynia (A918 EN)          Discovered 1918-Mar-05 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A918 EN = 1929 BG = A912 PA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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