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JPL Small-Body Database Browser
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577 Rhea
Classification: Main-belt Asteroid          SPK-ID: 2000577
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1554920641363348 3.8157e-08  
a 3.110597578678536 1.4843e-08 au
q 2.626924340472325 1.2151e-07 au
i 5.29723360433812 4.3771e-06 deg
node 328.5598367405955 4.4945e-05 deg
peri 330.5736808177851 4.7098e-05 deg
M 285.1743330148502 1.627e-05 deg
tp 2459016.997373744405
(2020-Jun-16.49737374)		 9.1767e-05 TDB
period 2003.84521233527
5.49		 1.4343e-05
3.927e-08		 d
yr
n .1796545949676712 1.2859e-09 deg/d
Q 3.594270816884746 1.7151e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2622  
   data-arc span      41476 days (113.56 yr)  
   first obs. used      1905-10-20  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46468  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:10:14  

Additional Information
 Earth MOID = 1.61223 au 
 Jupiter MOID = 1.64881 au 
 T_jup = 3.194 
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[ 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 9.4   n/a MPO350801  
diameter diameter 38.234 km 1.701 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 12.249 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Alkema, M.S. (2013) Minor Planet Bull. 40, 133-137.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.230   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

577 Rhea          Discovered 1905-Oct-20 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1943 QD = 1949 SF1 = 1952 DC = A912 AC 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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