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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 126 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1919485134766909 2.8559e-08  
a 2.366236890505632 4.2547e-09 au
q 1.912041236839368 6.7279e-08 au
i 4.815899826402998 3.3884e-06 deg
node 160.0471405226476 3.1685e-05 deg
peri 298.7456066445258 3.2678e-05 deg
M 298.4248427928511 8.536e-06 deg
tp 2459227.899123686039
(2021-Jan-13.39912369)
3.1596e-05 TDB
period 1329.492091292133
3.64
3.5858e-06
9.817e-09
d
yr
n .2707800989249332 7.3033e-10 deg/d
Q 2.820432544171895 5.0714e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3320  
   data-arc span      46799 days (128.13 yr)  
   first obs. used      1892-09-13  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:41  

Additional Information
 Earth MOID = .93433 au 
 Jupiter MOID = 2.35348 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454159.5 (2007-Feb-28.0) TDB
Reference: JPL 126 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1903236387344459 2.8288e-08  
q 1.916814809425415 6.6401e-08 au
tp 2453901.866287138653
(2006-Jun-15.36628714)
3.3236e-05 TDB
node 160.3640223234304 3.1783e-05 deg
peri 297.5037030555773 3.2801e-05 deg
i 4.805886562352458 3.3806e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3320  
   data-arc span      46799 days (128.13 yr)  
   first obs. used      1892-09-13  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:41  

Additional Information
 Jupiter MOID = 2.35348 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.002369326226038E-16 -1.875929904160524E-15 1.812251407166193E-13 5.231171847976108E-16 5.710742986289997E-14 8.485354175629618E-17
q -1.875929904160524E-15 4.409038010336104E-15 -4.585782546870625E-13 -1.397742150659039E-15 -1.409874677346484E-13 -1.559738912312051E-16
tp 1.812251407166193E-13 -4.585782546870625E-13 1.104610869857291E-9 -1.568060871616672E-12 2.75854170215699E-10 2.169498887145589E-13
node 5.231171847976108E-16 -1.397742150659039E-15 -1.568060871616672E-12 1.010158265473603E-9 -1.006646482215408E-9 -2.671138054173208E-11
peri 5.710742986289997E-14 -1.409874677346484E-13 2.75854170215699E-10 -1.006646482215408E-9 1.075914190394035E-9 2.665453609068107E-11
i 8.485354175629618E-17 -1.559738912312051E-16 2.169498887145589E-13 -2.671138054173208E-11 2.665453609068107E-11 1.142855449796238E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1958-Mar-12 18:16 < 00:01 Amphi 0.046837060069188 0.046836739064526 0.0468373810758321 4.20365197968357 4.20365195048533 2436275.261431297 0.246964402422241 67.1963301331089 15.5600322403347 -86.7324099008775 449396.977154869 T 126 CATAB v2.0f-lin.ifort 2020-Nov-13 04:32:50 2020-Nov-13 04:32

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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