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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1988232464410171 4.3646e-08  
a 3.14438302721055 2.1513e-08 au
q 2.519206585686515 1.4123e-07 au
i 11.79788656000162 5.3774e-06 deg
node 339.6085148666219 2.0433e-05 deg
peri 25.42656781576333 2.3474e-05 deg
M 304.0131751971139 1.4398e-05 deg
tp 2459517.226884674357
(2021-Oct-29.72688467)
8.3518e-05 TDB
period 2036.580550588587
5.58
2.0901e-05
5.722e-08
d
yr
n .1767668850102478 1.8141e-09 deg/d
Q 3.769559468734584 2.5791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1404  
   data-arc span      11609 days (31.78 yr)  
   first obs. used      1988-11-03  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48892  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:55:04  

Additional Information
 Earth MOID = 1.52042 au 
 Jupiter MOID = 1.72325 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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