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JPL Small-Body Database Browser
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158 Koronis
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05157967746859995 3.8017e-08  
a 2.870949343833034 1.154e-08 au
q 2.722866702649438 1.0791e-07 au
i 1.005094952536947 4.2035e-06 deg
node 277.6990824314507 0.00025033 deg
peri 145.2642766189366 0.00025417 deg
M 215.3001287060929 4.4124e-05 deg
tp 2459314.671253990394
(2021-Apr-10.17125399)
0.00021839 TDB
period 1776.792537115185
4.86
1.0713e-05
2.933e-08
d
yr
n .2026122872986055 1.2216e-09 deg/d
Q 3.019031985016631 1.2135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2677  
   data-arc span      46030 days (126.02 yr)  
   first obs. used      1893-08-12  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4876  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:05:39  

Additional Information
 Earth MOID = 1.73552 au 
 Jupiter MOID = 2.14885 au 
 T_jup = 3.296 
[ 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 9.27   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
diameter diameter 39.025 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.218 h n/a LCDB (Rev. 2019-January); 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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          Discovered 1876-Jan-04 by Knorre, V. at Berlin
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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