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JPL Small-Body Database Browser
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879 Ricarda (A917 OB)
Classification: Main-belt Asteroid          SPK-ID: 2000879
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1546656747157365 5.8152e-08  
a 2.531717913075507 7.734e-09 au
q 2.140148053859768 1.4795e-07 au
i 13.68122533645965 3.6298e-06 deg
node 269.8569816133465 2.101e-05 deg
peri 96.99791751595075 2.3676e-05 deg
M 51.62285792832422 1.1566e-05 deg
tp 2458389.510451915768
(2018-Sep-28.01045192)
4.7015e-05 TDB
period 1471.368311606946
4.03
6.7422e-06
1.846e-08
d
yr
n .244670214221773 1.1211e-09 deg/d
Q 2.923287772291247 8.9302e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2486  
   data-arc span      37393 days (102.38 yr)  
   first obs. used      1917-07-22  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37426  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:49:50  

Additional Information
 Earth MOID = 1.18988 au 
 Jupiter MOID = 2.67052 au 
 T_jup = 3.394 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.0   n/a MPO347520  
diameter diameter 18.312 km 0.623 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 82.9 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.]
geometric albedo albedo 0.230   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

879 Ricarda (A917 OB)          Discovered 1917-Jul-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A917 OB = 1929 ND = 1933 OR = 1937 NX = 1949 MU = 1957 MC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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