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22805 (1999 RR2)
Classification: Main-belt Asteroid          SPK-ID: 2022805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1586537889767572 2.2719e-08  
a 3.155509327589471 1.7202e-08 au
q 2.654875816615902 7.3871e-08 au
i 17.2777316833178 5.3672e-07 deg
node 259.1549359852625 3.0227e-06 deg
peri 172.5961906733235 5.8479e-06 deg
M 233.0653935378982 7.4372e-06 deg
tp 2459922.405198831580
(2022-Dec-08.90519883)
4.54e-05 TDB
period 2047.399671554199
5.61
1.6741e-05
4.583e-08
d
yr
n .1758327917121921 1.4378e-09 deg/d
Q 3.656142838563039 1.9931e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1583  
   data-arc span      23699 days (64.88 yr)  
   first obs. used      1955-10-24  
   last obs. used      2020-09-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45345  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:13:17  

Additional Information
 Earth MOID = 1.67024 au 
 Jupiter MOID = 1.63987 au 
 T_jup = 3.117 
[ 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 12.55   n/a E2021B10  
diameter diameter 15.730 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.334 h n/a LCDB (Rev. 2020-October); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.086   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22805 (1999 RR2)          Discovered 1999-Sep-06 by CSS at Catalina
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RR2 = 2000 SL231 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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