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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2586512177780519 4.5103e-08  
a 2.347997530994461 8.05e-09 AU
q 1.740685110262884 1.0761e-07 AU
i 7.589747865807545 4.7613e-06 deg
node 257.9940644095703 4.0899e-05 deg
peri 78.44100651399995 4.1762e-05 deg
M 325.2006501970837 8.6022e-06 deg
tp 2457127.532109348289
(2015-Apr-15.03210935)
3.1596e-05 JED
period 1314.149822464552
3.60
6.7583e-06
1.85e-08
d
yr
n .2739413679064821 1.4088e-09 deg/d
Q 2.955309951726037 1.0132e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1277  
   data-arc span      30460 days (83.39 yr)  
   first obs. used      1931-03-21  
   last obs. used      2014-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55172  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:34:14  

Additional Information
 Earth MOID = .7512 AU 
 T_jup = 3.502 
[ 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 11.1 mag n/a MPO263344  
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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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