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21772 (1999 RU211)
Classification: Main-belt Asteroid          SPK-ID: 2021772
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1983902394487761 4.3778e-08  
a 3.144680775323875 2.1507e-08 au
q 2.520806803317409 1.4136e-07 au
i 11.80359452265856 5.3532e-06 deg
node 339.5901580885727 1.9922e-05 deg
peri 25.25282061900219 2.2747e-05 deg
M 338.7695182607868 1.3572e-05 deg
tp 2459516.621465887207
(2021-Oct-29.12146589)
7.7556e-05 TDB
period 2036.869829454806
5.58
2.0896e-05
5.721e-08
d
yr
n .1767417803504697 1.8132e-09 deg/d
Q 3.768554747330342 2.5774e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1492  
   data-arc span      11934 days (32.67 yr)  
   first obs. used      1988-11-03  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48209  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:30  

Additional Information
 Earth MOID = 1.52267 au 
 Jupiter MOID = 1.72374 au 
 T_jup = 3.146 
[ 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 13.17   n/a E2021B10  
diameter diameter 14.412 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 24.7406 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.033   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21772 (1999 RU211)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 RU211 = 1988 VB8 = 1996 EF10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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