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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2340262371714104 3.6129e-08  
a 2.968483586608549 1.2023e-08 AU
q 2.273780542729458 1.0877e-07 AU
i 6.171164461043007 5.1547e-06 deg
node 180.6310606121991 4.2818e-05 deg
peri 210.3096400288342 4.4504e-05 deg
M 117.6967031420923 1.1468e-05 deg
tp 2456389.751791370681
(2013-Apr-07.25179137)
5.8315e-05 JED
period 1868.10122320174
5.11
1.135e-05
3.107e-08
d
yr
n .1927090435618878 1.1708e-09 deg/d
Q 3.66318663048764 1.4837e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1506  
   data-arc span      47377 days (129.71 yr)  
   first obs. used      1884-08-20  
   last obs. used      2014-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54253  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:10:07  

Additional Information
 Earth MOID = 1.28136 AU 
 T_jup = 3.213 
[ 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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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