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22972 (1999 VR12)
Classification: Main-belt Asteroid          SPK-ID: 2022972
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09949929021804704 1.8115e-08  
a 3.021700271605547 1.3899e-08 au
q 2.721043239329116 5.4026e-08 au
i 10.80801814747932 3.8573e-07 deg
node 77.04043468810796 1.1562e-06 deg
peri 263.7374036854644 7.9943e-06 deg
M 73.03824560768851 7.5571e-06 deg
tp 2458811.254738518353
(2019-Nov-23.75473852)
3.8981e-05 TDB
period 1918.560515350632
5.25
1.3237e-05
3.624e-08
d
yr
n .1876406801451385 1.2946e-09 deg/d
Q 3.32235730388198 1.5282e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2524  
   data-arc span      16386 days (44.86 yr)  
   first obs. used      1976-05-02  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44987  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:15:15  

Additional Information
 Earth MOID = 1.73787 au 
 Jupiter MOID = 2.05096 au 
 T_jup = 3.212 
[ 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 12.45   n/a E2021B10  
rotation period rot_per 22.659 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]

22972 (1999 VR12)          Discovered 1999-Nov-11 by Juels, C. W. at Fountain Hills
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VR12 = 1976 JC2 = 1978 WB16 = 1978 WS14 = 1980 BM2 = 1980 DX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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