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163 Erigone (A876 HC)
Classification: Main-belt Asteroid          SPK-ID: 2000163
[ 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 122 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1919485095235097 2.9423e-08  
a 2.366236889696928 4.4487e-09 au
q 1.912041245540057 6.9087e-08 au
i 4.815900632870164 3.5089e-06 deg
node 160.0471381567817 3.1941e-05 deg
peri 298.7456077232328 3.2985e-05 deg
M 298.4248450023358 9.221e-06 deg
tp 2459227.899115409762
(2021-Jan-13.39911541)		 3.4191e-05 TDB
period 1329.492090610566
3.64		 3.7493e-06
1.027e-08		 d
yr
n .2707800990637491 7.6363e-10 deg/d
Q 2.820432533853798 5.3026e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3080  
   data-arc span      46483 days (127.26 yr)  
   first obs. used      1892-09-13  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43065  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:16:35  

Additional Information
 Earth MOID = .93433 au 
 Jupiter MOID = 2.35348 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453984.5 (2006-Sep-06.0) TDB
Reference: JPL 122 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1903819705665334 2.9115e-08  
q 1.916703294792952 6.8144e-08 au
tp 2453901.849244231338
(2006-Jun-15.34924423)		 3.4318e-05 TDB
node 160.364498609345 3.2039e-05 deg
peri 297.4925326435436 3.311e-05 deg
i 4.805896080540968 3.5007e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3080  
   data-arc span      46483 days (127.26 yr)  
   first obs. used      1892-09-13  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43065  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:16:35  

Additional Information
 Jupiter MOID = 2.35348 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.476909892204212E-16 -1.981395544114194E-15 2.386636119736956E-13 -6.364100552526024E-17 7.088568799249395E-14 2.112854525513553E-16
q -1.981395544114194E-15 4.643647458557932E-15 -5.84336477339823E-13 -1.746223444010828E-16 -1.711439767769679E-13 -4.3739832010841E-16
tp 2.386636119736956E-13 -5.84336477339823E-13 1.17773117269679E-9 -2.12002082341968E-12 2.932808236263805E-10 2.877715739694117E-13
node -6.364100552526024E-17 -1.746223444010828E-16 -2.12002082341968E-12 1.026465651769031E-9 -1.023025123891971E-9 -3.02095304700854E-11
peri 7.088568799249395E-14 -1.711439767769679E-13 2.932808236263805E-10 -1.023025123891971E-9 1.096251555535771E-9 3.015618972649012E-11
i 2.112854525513553E-16 -4.3739832010841E-16 2.877715739694117E-13 -3.02095304700854E-11 3.015618972649012E-11 1.225481691801274E-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 9.7   n/a MPO492750 IRAS observations used: 15
magnitude slope G -0.04   n/a PDS3 (MPC 17257) Fit
diameter diameter 81.579 km 3.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.136 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Pilcher, F.; Briggs, J.; Martinez, L.; Odden, C.; Aggarwal, A. (2014) Minor Planet Bull. 41, 187.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.]
geometric albedo albedo 0.033   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.717   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.23, mean=11.78, max.=18.33) deg.
U-B UB 0.341   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.23, mean=11.78, max.=18.33) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

163 Erigone (A876 HC)          Discovered 1876-Apr-26 by Perrotin, J. at Toulouse
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A876 HC = 1957 OT = 2017 YH23 = A892 RA 
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