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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 129 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1920793460319339 2.83e-08  
a 2.366693338137232 4.1224e-09 au
q 1.912100429489698 6.679e-08 au
i 4.815795782138252 3.3225e-06 deg
node 160.044412526044 3.1661e-05 deg
peri 298.7201598118137 3.2614e-05 deg
M 352.6038239658896 8.0683e-06 deg
tp 2459227.822230299538
(2021-Jan-13.32223030)
2.9809e-05 TDB
period 1329.876798831048
3.64
3.4747e-06
9.513e-09
d
yr
n .2707017674993936 7.0728e-10 deg/d
Q 2.821286246784766 4.9143e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3379  
   data-arc span      46882 days (128.36 yr)  
   first obs. used      1892-09-13  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:01  

Additional Information
 Earth MOID = .934205 au 
 Jupiter MOID = 2.35267 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454212.5 (2007-Apr-22.0) TDB
Reference: JPL 129 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1903000457485469 2.8052e-08  
q 1.916991740277232 6.5928e-08 au
tp 2453901.904512229320
(2006-Jun-15.40451223)
3.2493e-05 TDB
node 160.3627042192685 3.1761e-05 deg
peri 297.5252988064281 3.2739e-05 deg
i 4.805738804254454 3.3147e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3379  
   data-arc span      46882 days (128.36 yr)  
   first obs. used      1892-09-13  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:01  

Additional Information
 Jupiter MOID = 2.35267 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.869040384225581E-16 -1.847083708071762E-15 1.55987969188251E-13 6.478365277668392E-16 5.12571167818173E-14 -8.230585585407921E-17
q -1.847083708071762E-15 4.346457945546156E-15 -4.049502167555943E-13 -1.599053623819051E-15 -1.285870196651241E-13 2.281426956714536E-16
tp 1.55987969188251E-13 -4.049502167555943E-13 1.05580421985969E-9 -1.313079166878255E-12 2.64459363455298E-10 1.991765398290598E-13
node 6.478365277668392E-16 -1.599053623819051E-15 -1.313079166878255E-12 1.008748700161156E-9 -1.005182679607731E-9 -2.665982021857731E-11
peri 5.12571167818173E-14 -1.285870196651241E-13 2.64459363455298E-10 -1.005182679607731E-9 1.071856839513419E-9 2.659599487756789E-11
i -8.230585585407921E-17 2.281426956714536E-16 1.991765398290598E-13 -2.665982021857731E-11 2.659599487756789E-11 1.098701092105086E-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 9.74   n/a E2021B10 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

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