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220 Stephania
Classification: Main-belt Asteroid          SPK-ID: 2000220
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2584431627938431 3.7491e-08  
a 2.347704714810647 6.7333e-09 au
q 1.740956483008966 8.803e-08 au
i 7.589544174276955 4.6679e-06 deg
node 257.9863994481174 3.2374e-05 deg
peri 78.41490906794418 3.3452e-05 deg
M 129.6265752139251 8.7784e-06 deg
tp 2457127.397567244292
(2015-Apr-14.89756724)
3.135e-05 JED
period 1313.904000865394
3.60
5.6525e-06
1.548e-08
d
yr
n .2739926202849589 1.1787e-09 deg/d
Q 2.954452946612328 8.4735e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1632  
   data-arc span      31068 days (85.06 yr)  
   first obs. used      1931-03-21  
   last obs. used      2016-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55554  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:26:13  

Additional Information
 Earth MOID = .750195 au 
 Jupiter MOID = 2.47966 au 
 T_jup = 3.503 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.2 mag n/a MPO358625  
diameter diameter 31.12 km 1.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 18.198 h n/a LCDB (Rev. 2016-February); 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) http://www.minorplanetobserver.com/DATA/submi ssions_results.htm]
[Koff, R.A. (2011) http://www.antelopehillsobservatory.org]
geometric albedo albedo 0.0726   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
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 | Physical Parameters | Discovery Circumstances ]
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