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636 Erika (A907 CE)
Classification: Main-belt Asteroid          SPK-ID: 2000636
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1692365937570291 3.4956e-08  
a 2.913014700417091 1.05e-08 au
q 2.42002601495435 1.0067e-07 au
i 7.928156589152257 4.5622e-06 deg
node 34.59904710288117 2.6803e-05 deg
peri 298.5227135694051 3.0215e-05 deg
M 99.41737215298298 1.5461e-05 deg
tp 2458498.998518863298
(2019-Jan-15.49851886)
7.7253e-05 TDB
period 1815.985770891205
4.97
9.8188e-06
2.688e-08
d
yr
n .1982394387502981 1.0719e-09 deg/d
Q 3.406003385879831 1.2277e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3133  
   data-arc span      41532 days (113.71 yr)  
   first obs. used      1907-02-15  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42367  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:27:27  

Additional Information
 Earth MOID = 1.42279 au 
 Jupiter MOID = 2.02886 au 
 T_jup = 3.247 
[ 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 9.6   n/a MPO458832  
diameter diameter 73.147 km 0.565 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 14.603 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.048   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

636 Erika (A907 CE)          Discovered 1907-Feb-08 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A907 CE = 1954 UT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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