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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1690195722794853 3.5476e-08  
a 2.911942177486548 1.0746e-08 au
q 2.419766956145179 1.0253e-07 au
i 7.929658712840649 4.7121e-06 deg
node 34.60330339336441 2.7344e-05 deg
peri 298.4239650000242 3.0809e-05 deg
M 20.20709451644752 1.5548e-05 deg
tp 2458498.623522728600
(2019-Jan-15.12352273)
7.8241e-05 TDB
period 1814.982940167482
4.97
1.0047e-05
2.751e-08
d
yr
n .1983489717907652 1.098e-09 deg/d
Q 3.404117398827917 1.2563e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2871  
   data-arc span      41200 days (112.80 yr)  
   first obs. used      1907-02-15  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4395  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:46:22  

Additional Information
 Earth MOID = 1.42165 au 
 Jupiter MOID = 2.02717 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-January); 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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