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239 Adrastea
Classification: Main-belt Asteroid          SPK-ID: 2000239
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2347132367651176 3.5935e-08  
a 2.966350052882037 1.1431e-08 au
q 2.270108430591717 1.0786e-07 au
i 6.174500982268316 5.0874e-06 deg
node 180.6339347202983 3.8478e-05 deg
peri 210.1740361027128 4.0042e-05 deg
M 194.992923676539 1.1179e-05 deg
tp 2458255.826830099015
(2018-May-17.32683010)
6.0498e-05 JED
period 1866.087598764787
5.11
1.0786e-05
2.953e-08
d
yr
n .192916988590618 1.1151e-09 deg/d
Q 3.662591675172358 1.4114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1694  
   data-arc span      47808 days (130.89 yr)  
   first obs. used      1884-08-20  
   last obs. used      2015-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53954  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 13:54:59  

Additional Information
 Earth MOID = 1.27636 au 
 Jupiter MOID = 1.78932 au 
 T_jup = 3.214 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.4 mag n/a MPO267706  
diameter diameter 41.52 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
rotation period rot_per 18.4707 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Uzpen, B.; Kipp, S. (2003) Minor Planet Bul. 30, 59-61.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Carbo, L.; Green, D.; Kragh, K.; Krotz, J.; et al. (2009) Minor Planet Bul. 36, 152-157.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.0777   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15

239 Adrastea          Discovered 1884-Aug-18 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1955 MK1 = 1956 UJ = A915 TD 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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