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JPL Small-Body Database Browser
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212 Medea
Classification: Main-belt Asteroid          SPK-ID: 2000212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 77 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1023387039848897 3.1612e-08  
a 3.124040505953618 1.3319e-08 au
q 2.804330249378026 9.2994e-08 au
i 4.264794540561917 3.5275e-06 deg
node 313.0591552381389 3.9221e-05 deg
peri 102.9283403928553 4.2858e-05 deg
M 205.318525444636 1.7924e-05 deg
tp 2459467.081102122203
(2021-Sep-09.58110212)
0.00010229 TDB
period 2016.849125991052
5.52
1.2898e-05
3.531e-08
d
yr
n .1784962471216586 1.1415e-09 deg/d
Q 3.44375076252921 1.4683e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2672  
   data-arc span      51025 days (139.70 yr)  
   first obs. used      1880-02-11  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46166  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:50:50  

Additional Information
 Earth MOID = 1.81975 au 
 Jupiter MOID = 1.8747 au 
 T_jup = 3.203 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.28   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
diameter diameter 136.12 km 2.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
rotation period rot_per 10.283 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Di Martino, M.; Dotto, E.; Celino, A.; Barucci, M.A.; Fulchignoni, M. (1995) Astron. Astrophys. Suppl. Ser. 112, 1-7.]
[Holliday, B. (1996) Minor Planet Bull. 23, 43.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Koff, R.A. (2005) Minor Planet Bull. 32, 32-34.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Collaborative Asteroid Lightcurve Link (CALL) (2011) http://www.minorplanetobserver.com/DATA/submissions_results.htm]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.0465   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
B-V BV 0.704   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.98 deg.
U-B UB 0.286   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.98 deg.
Tholen spectral type spec_T DCX:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

212 Medea          Discovered 1880-Feb-06 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 FW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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