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851 Zeissia (A916 GL)
Classification: Main-belt Asteroid          SPK-ID: 2000851
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08996209870788575 3.0234e-08  
a 2.228918657273277 4.752e-09 au
q 2.02840045701581 6.7106e-08 au
i 2.393097621006114 3.2663e-06 deg
node 141.1653768880007 7.0022e-05 deg
peri 7.75972703192951 7.2189e-05 deg
M 155.7625149167196 1.9045e-05 deg
tp 2458474.603590174882
(2018-Dec-22.10359018)
6.3576e-05 TDB
period 1215.457439411956
3.33
3.887e-06
1.064e-08
d
yr
n .2961847846965088 9.4718e-10 deg/d
Q 2.429436857530744 5.1795e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3639  
   data-arc span      37155 days (101.72 yr)  
   first obs. used      1919-02-08  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39625  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:25:05  

Additional Information
 Earth MOID = 1.0396 au 
 Jupiter MOID = 2.55852 au 
 T_jup = 3.637 
[ 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 11.5   n/a MPO473773 IRAS observations used: 2
diameter diameter 12.642 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.341 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Robinson, L. (2011) http://btboar.tripod.com/lightcurves/]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.335   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.859   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.53 deg.
U-B UB 0.482   0.048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.53 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

851 Zeissia (A916 GL)          Discovered 1916-Apr-02 by Belyavskij, S. at Simeis
Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A916 GL = 1950 NS1 = 1950 PA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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