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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2570983057245488 3.4512e-08  
a 2.34869429735839 6.5142e-09 au
q 1.744848972842638 8.1106e-08 au
i 7.594572964772556 3.8528e-06 deg
node 257.8847246157767 2.977e-05 deg
peri 78.59758841005423 3.0605e-05 deg
M 43.30414839580065 8.3237e-06 deg
tp 2458442.351466745503
(2018-Nov-19.85146675)
3.0086e-05 TDB
period 1314.734825200718
3.60
5.4697e-06
1.498e-08
d
yr
n .2738194753037286 1.1392e-09 deg/d
Q 2.952539621874141 8.1889e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      32400 days (88.71 yr)  
   first obs. used      1931-03-21  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46976  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:39:17  

Additional Information
 Earth MOID = .753942 au 
 Jupiter MOID = 2.48941 au 
 T_jup = 3.503 
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Orbital Elements at Epoch 2456225.5 (2012-Oct-25.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .258480776994372 3.4577e-08  
q 1.74106528184045 8.1384e-08 au
tp 2455814.225151629463
(2011-Sep-09.72515163)
2.6461e-05 TDB
node 257.9921516641174 2.9814e-05 deg
peri 78.58131565404162 3.0626e-05 deg
i 7.590036959149583 3.8515e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      32400 days (88.71 yr)  
   first obs. used      1931-03-21  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46976  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:39:17  

Additional Information
 Jupiter MOID = 2.48941 au 
 T_jup = 3.503 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.195560498761533E-15 -2.809005948674622E-15 -8.047365959205216E-14 4.840891840513274E-15 -4.314969526415861E-14 -1.265680300080948E-15
q -2.809005948674622E-15 6.623356713526219E-15 2.01779202668241E-13 -1.220679118325202E-14 1.050659487689806E-13 3.218179691777713E-15
tp -8.047365959205216E-14 2.01779202668241E-13 7.001677303523668E-10 -6.695179924984085E-12 2.007153953609378E-10 8.005532476267385E-13
node 4.840891840513274E-15 -1.220679118325202E-14 -6.695179924984085E-12 8.888795470372754E-10 -8.823162918354598E-10 1.319235993651568E-11
peri -4.314969526415861E-14 1.050659487689806E-13 2.007153953609378E-10 -8.823162918354598E-10 9.379488693134798E-10 -1.288776407067445E-11
i -1.265680300080948E-15 3.218179691777713E-15 8.005532476267385E-13 1.319235993651568E-11 -1.288776407067445E-11 1.483442338889288E-11

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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.198 h n/a LCDB (Rev. 2019-January); 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          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 ]
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