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577 Rhea (A905 UR)
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1552385900068092 1.3609e-08  
a 3.111318059415171 1.1691e-08 au
q 2.628321430808839 4.0754e-08 au
i 5.301475400419237 6.9306e-07 deg
node 328.4841937554959 6.5737e-06 deg
peri 329.9779377250719 1.0765e-05 deg
M 33.44310433703529 6.5962e-06 deg
tp 2459014.283086259972
(2020-Jun-13.78308626)
3.65e-05 TDB
period 2004.541452575954
5.49
1.1298e-05
3.093e-08
d
yr
n .1795921952810598 1.0123e-09 deg/d
Q 3.594314688021504 1.3506e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3443  
   data-arc span      42088 days (115.23 yr)  
   first obs. used      1905-10-20  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41849  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:06:48  

Additional Information
 Earth MOID = 1.6124 au 
 Jupiter MOID = 1.64804 au 
 T_jup = 3.194 
[ 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 9.39   n/a E2021B10  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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 (A905 UR)          Discovered 1905-Oct-20 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A905 UR = 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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