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21589 Rafes (1998 SR162)
Classification: Main-belt Asteroid          SPK-ID: 2021589
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1587493870739888 1.0546e-08  
a 2.783222976401104 9.5543e-09 au
q 2.341388034807186 2.8723e-08 au
i 8.859038725276331 2.9787e-07 deg
node 226.9159313908141 4.4242e-06 deg
peri 27.28578348717632 9.3351e-06 deg
M 81.81024440604637 7.5879e-06 deg
tp 2459011.087658164319
(2020-Jun-10.58765816)
3.5688e-05 TDB
period 1695.978835758014
4.64
8.7329e-06
2.391e-08
d
yr
n .2122667998030169 1.093e-09 deg/d
Q 3.225057917995021 1.1071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2114  
   data-arc span      10686 days (29.26 yr)  
   first obs. used      1992-05-07  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5022  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:44:00  

Additional Information
 Earth MOID = 1.33135 au 
 Jupiter MOID = 1.81918 au 
 T_jup = 3.296 
[ 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 13.5   n/a MPO474049  
diameter diameter 5.271 km 0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.77 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.253   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21589 Rafes           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Courtney Anne Rafes (b. 1987) was awarded second place in the 2006 Intel International Science and Engineering Fair for her engineering project. She attends the Northwest High School, Justin, Texas, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 SR162 = 1992 JK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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