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220 Stephania (A881 KA)
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2574754401945049 6.1028e-09  
a 2.348480413337323 5.48e-09 au
q 1.743804385125123 1.3377e-08 au
i 7.593955973237675 9.2702e-07 deg
node 257.8751229241549 1.731e-06 deg
peri 78.63807917319363 5.0549e-06 deg
M 207.5252263461042 4.7518e-06 deg
tp 2459757.268090615330
(2022-Jun-26.76809062)
1.8504e-05 TDB
period 1314.555239652244
3.60
4.6011e-06
1.26e-08
d
yr
n .273856882648184 9.5853e-10 deg/d
Q 2.953156441549523 6.8909e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3182  
   data-arc span      32875 days (90.01 yr)  
   first obs. used      1931-03-21  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43769  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:03:42  

Additional Information
 Earth MOID = .752003 au 
 Jupiter MOID = 2.4925 au 
 T_jup = 3.503 
[ 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 11.28   n/a E2021B10  
diameter diameter 31.738 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.198 h n/a LCDB (Rev. 2020-October); 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/submissions_results.htm]
[Koff, R.A. (2011) http://www.antelopehillsobservatory.org]
[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] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
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 (A881 KA)          Discovered 1881-May-19 by Palisa, J. at Vienna
Initial announcement gave May 18.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A881 KA = 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 ]
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