Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2340262399833308 3.5907e-08  
a 2.968483591270355 1.1657e-08 AU
q 2.273780537953139 1.0793e-07 AU
i 6.171163714258515 5.0964e-06 deg
node 180.6310911983836 3.877e-05 deg
peri 210.3096078792528 4.0348e-05 deg
M 117.696703598232 1.103e-05 deg
tp 2456389.751787564986
(2013-Apr-07.25178757)
5.5835e-05 JED
period 1868.101227602333
5.11
1.1004e-05
3.013e-08
d
yr
n .1927090431079327 1.1352e-09 deg/d
Q 3.663186644587571 1.4386e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1683  
   data-arc span      47783 days (130.82 yr)  
   first obs. used      1884-08-20  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54042  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:34:06  

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 LCDB (Rev. 2015-May); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Jul-07 13:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin