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220 Stephania
Classification: Main-belt Asteroid          SPK-ID: 2000220
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2573171587936489 3.3936e-08  
a 2.348768802869028 6.3966e-09 au
q 1.74439028785161 7.9551e-08 au
i 7.59417183452729 3.7828e-06 deg
node 257.8827143486105 2.8384e-05 deg
peri 78.61409418725788 2.9209e-05 deg
M 152.7862062241888 8.5421e-06 deg
tp 2458442.491932236128
3.0016e-05 TDB
period 1314.797384917268
n .2738064466280122 1.1185e-09 deg/d
Q 2.953147317886447 8.0425e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2688  
   data-arc span      32462 days (88.88 yr)  
   first obs. used      1931-03-21  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45937  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:21:09  

Additional Information
 Earth MOID = .754377 au 
 Jupiter MOID = 2.49216 au 
 T_jup = 3.502 
[ 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 11.2   n/a MPO358625  
diameter diameter 31.738 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 18.198 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Mohamed, R.A.; Chiorny, V.G.; Dovgopol, A.N.; Shevchenko, V.G. (1994) Astron. Astrophys. Suppl. Ser. 108, 69-72.]
[Collaborative Asteroid Lightcurve Link (CALL) (2011)]
[Koff, R.A. (2011)]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Durech, J.; Delbo, J.; Carry, B.; Hanus, J.; Ali-Lagoa, V. (2017) Astron. Astrophys. 604, A27.]
geometric albedo albedo 0.055   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979)

220 Stephania          Discovered 1881-May-19 by Palisa, J. at Vienna
Initial announcement gave May 18.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1925 VE = 1931 FP = 1932 UA = 1943 WB = 1946 MA = 1950 TT4 = 1961 WB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Mar-31 14:54 UT
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