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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .257317159187567 3.3829e-08  
a 2.348768802599684 6.3537e-09 au
q 1.74439028672635 7.9255e-08 au
i 7.594171805039813 3.7301e-06 deg
node 257.8827147141118 2.8153e-05 deg
peri 78.61409422604008 2.8962e-05 deg
M 152.786206156213 8.5371e-06 deg
tp 2458442.491932580375
2.9987e-05 TDB
period 1314.797384691107
n .2738064466751102 1.111e-09 deg/d
Q 2.953147318473018 7.9887e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2824  
   data-arc span      32546 days (89.11 yr)  
   first obs. used      1931-03-21  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44916  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:01:07  

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 (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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