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JPL Small-Body Database Browser
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158 Koronis (A876 AA)
Classification: Main-belt Asteroid          SPK-ID: 2000158
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05207515213893295 3.7153e-08  
a 2.86779122201818 1.0811e-08 au
q 2.718450557828886 1.0618e-07 au
i 1.005670452731154 4.1848e-06 deg
node 277.7032752460857 0.00024442 deg
peri 146.4082147004761 0.0002482 deg
M 295.274119838089 4.3457e-05 deg
tp 2459319.429863905531
0.00021447 TDB
period 1773.861563856429
n .2029470660705614 1.1476e-09 deg/d
Q 3.017131886207473 1.1374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2829  
   data-arc span      46141 days (126.33 yr)  
   first obs. used      1893-08-12  
   last obs. used      2019-12-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:18:52  

Additional Information
 Earth MOID = 1.73168 au 
 Jupiter MOID = 2.14758 au 
 T_jup = 3.297 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.2   n/a MPO492750 IRAS observations used: 11
diameter diameter 39.025 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 14.218 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.]
[Slivan, S.M.; Binzel, R.P.; Crespo da Silva, L.D.; Kaasalainen, M.; et al. (2003) Icarus 162, 285-307.]
[Buchheim, R.K. (2011) Minor Planet Bull. 38, 128-130.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Klinglesmith III, D.A.; Hanowell, J.; Risely, E.; Turk, J.; et al. (2013) Minor Planet Bull. 40, 190-193.]
geometric albedo albedo 0.213   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.859   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.71, mean=12.72, max.=13.87) deg.
U-B UB 0.394   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=11.71, mean=14.34, max.=20.84) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

158 Koronis (A876 AA)          Discovered 1876-Jan-04 by Knorre, V. at Berlin
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A876 AA = 1955 HA1 = A893 PA = A911 HB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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