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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08996209873380415 3.0234e-08  
a 2.228918657286646 4.7463e-09 au
q 2.028400456970207 6.7105e-08 au
i 2.393097556947268 3.2633e-06 deg
node 141.1653803034318 6.9633e-05 deg
peri 7.759723705849597 7.1798e-05 deg
M 155.7625148381808 1.9006e-05 deg
tp 2458474.603590435318
(2018-Dec-22.10359044)
6.3438e-05 TDB
period 1215.457439422891
3.33
3.8823e-06
1.063e-08
d
yr
n .296184784693844 9.4605e-10 deg/d
Q 2.429436857603085 5.1733e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3662  
   data-arc span      37164 days (101.75 yr)  
   first obs. used      1919-02-08  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39516  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:38  

Additional Information
 Earth MOID = 1.0396 au 
 Jupiter MOID = 2.55852 au 
 T_jup = 3.637 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456858.5 (2014-Jul-20.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08987562308761038 3.0167e-08  
q 2.027887326223497 6.6889e-08 au
tp 2457258.975865346408
(2015-Aug-24.47586535)
6.1939e-05 TDB
node 141.2044566245943 6.9709e-05 deg
peri 7.587583053310148 7.1882e-05 deg
i 2.391684653242225 3.2621e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3662  
   data-arc span      37164 days (101.75 yr)  
   first obs. used      1919-02-08  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39516  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:38  

Additional Information
 Jupiter MOID = 2.55852 au 
 T_jup = 3.637 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.100188759470194E-16 -2.013720059946285E-15 3.349190487999491E-13 -1.998829290422956E-15 1.019675597386554E-13 -3.078146519665494E-17
q -2.013720059946285E-15 4.474182208675103E-15 -6.428740087801636E-13 4.343312838050854E-15 -1.999072848575589E-13 1.06422848101098E-16
tp 3.349190487999491E-13 -6.428740087801636E-13 3.836467171098934E-9 6.509727150028754E-13 1.093530050668878E-9 1.642061256062838E-13
node -1.998829290422956E-15 4.343312838050854E-15 6.509727150028754E-13 4.859309477876321E-9 -4.854501574667518E-9 4.342630434662968E-11
peri 1.019675597386554E-13 -1.999072848575589E-13 1.093530050668878E-9 -4.854501574667518E-9 5.167060802429631E-9 -4.334937594211346E-11
i -3.078146519665494E-17 1.06422848101098E-16 1.642061256062838E-13 4.342630434662968E-11 -4.334937594211346E-11 1.064143533625656E-11

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. 2020-October); 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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