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202 Chryseis (A879 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000202
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 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1039062752958256 3.7822e-08  
a 3.069170830552393 1.1152e-08 au
q 2.750264721303099 1.1526e-07 au
i 8.85048151891567 3.9236e-06 deg
node 136.7263501356693 2.8914e-05 deg
peri .2535903551173861 3.6223e-05 deg
M 268.7981585856684 2.2437e-05 deg
tp 2459498.043579347099
(2021-Oct-10.54357935)
0.00012353 TDB
period 1963.94815923979
5.38
1.0705e-05
2.931e-08
d
yr
n .1833042274086041 9.9911e-10 deg/d
Q 3.388076939801688 1.2311e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2597  
   data-arc span      51449 days (140.86 yr)  
   first obs. used      1879-09-22  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:12:01  

Additional Information
 Earth MOID = 1.76396 au 
 Jupiter MOID = 1.63839 au 
 T_jup = 3.205 
[ 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 7.5   n/a MPO502154 IRAS observations used: 5
diameter diameter 86.15 km 2.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 23.670 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Pilcher, F.; Hamanowa, H.; Hamanowa, H.; Ferrero, A. (2011) Minor Planet Bull. 38, 208-209.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
geometric albedo albedo 0.2562   0.015 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
B-V BV 0.875   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.80, mean=8.43, max.=12.05) deg.
U-B UB 0.475   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.80, mean=8.43, max.=12.05) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

202 Chryseis (A879 RA)          Discovered 1879-Sep-11 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A879 RA = 1935 BL = A901 TA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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