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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 ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 132 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1920793425195322 1.91e-08  
a 2.366693335615026 3.2086e-09 au
q 1.912100435764733 4.515e-08 au
i 4.815790761893261 5.4846e-07 deg
node 160.0444760415472 7.4975e-06 deg
peri 298.7201077332186 8.6082e-06 deg
M 352.603815522353 5.9621e-06 deg
tp 2459227.822261447149
(2021-Jan-13.32226145)
2.2045e-05 TDB
period 1329.876796705155
3.64
2.7045e-06
7.405e-09
d
yr
n .2707017679321275 5.505e-10 deg/d
Q 2.821286235465319 3.8249e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3455  
   data-arc span      46943 days (128.52 yr)  
   first obs. used      1892-09-13  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41794  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:34:18  

Additional Information
 Earth MOID = .934205 au 
 Jupiter MOID = 2.35267 au 
 T_jup = 3.518 
[ 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 9.75   n/a MPCxxxxx 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. 2020-October); 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

Alternate Designations
 A876 HC = 1957 OT = 2017 YH23 = A892 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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