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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 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1039062750739842 3.7902e-08  
a 3.069170830625043 1.1185e-08 au
q 2.750264722049069 1.1546e-07 au
i 8.850481586640074 3.9325e-06 deg
node 136.7263508439454 2.8921e-05 deg
peri .2535893843190408 3.6232e-05 deg
M 268.7981588166741 2.2442e-05 deg
tp 2459498.043578104534
(2021-Oct-10.54357810)
0.00012356 TDB
period 1963.948159309523
5.38
1.0735e-05
2.939e-08
d
yr
n .1833042274020956 1.002e-09 deg/d
Q 3.388076939201018 1.2347e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2576  
   data-arc span      51268 days (140.36 yr)  
   first obs. used      1879-09-22  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:20:41  

Additional Information
 Earth MOID = 1.76396 au 
 Jupiter MOID = 1.63839 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455064.5 (2009-Aug-21.0) TDB
Reference: JPL 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1000770357902416 3.8204e-08  
q 2.762587204023646 1.158e-07 au
tp 2455572.685305565420
(2011-Jan-11.18530557)
0.0001209 TDB
node 136.8708665488011 2.888e-05 deg
peri 1.149452606701282 3.6615e-05 deg
i 8.853609306346346 3.934e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2576  
   data-arc span      51268 days (140.36 yr)  
   first obs. used      1879-09-22  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:20:41  

Additional Information
 Jupiter MOID = 1.63839 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.459559620770481E-15 -4.407175746851873E-15 -4.076513146924628E-13 -1.194466984757021E-14 -3.12800000714173E-14 -2.006843267012635E-15
q -4.407175746851873E-15 1.340871052265777E-14 1.502249152134551E-12 3.752193613457419E-14 1.369807333440041E-13 6.505616172384968E-15
tp -4.076513146924628E-13 1.502249152134551E-12 1.461767938060256E-8 2.095067913691835E-11 2.750881117510181E-9 2.754369413591499E-12
node -1.194466984757021E-14 3.752193613457419E-14 2.095067913691835E-11 8.340725968140235E-10 -8.191688141774676E-10 -1.438582135467795E-11
peri -3.12800000714173E-14 1.369807333440041E-13 2.750881117510181E-9 -8.191688141774676E-10 1.340662618959847E-9 1.475499791553635E-11
i -2.006843267012635E-15 6.505616172384968E-15 2.754369413591499E-12 -1.438582135467795E-11 1.475499791553635E-11 1.547615361806969E-11

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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