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21217 (1994 VM1)
Classification: Main-belt Asteroid          SPK-ID: 2021217
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1845961968395054 2.8756e-08  
a 3.068984501849647 1.4564e-08 au
q 2.502461634648818 9.1823e-08 au
i 4.689827105856438 4.5651e-06 deg
node 179.5116794238565 4.1525e-05 deg
peri 242.7842639689821 4.3751e-05 deg
M 340.303778809699 1.4924e-05 deg
tp 2459503.941207799196
(2021-Oct-16.44120780)
8.1662e-05 TDB
period 1963.769315647065
5.38
1.3979e-05
3.827e-08
d
yr
n .1833209212159319 1.3049e-09 deg/d
Q 3.635507369050475 1.7252e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1481  
   data-arc span      13586 days (37.20 yr)  
   first obs. used      1983-11-09  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50121  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:41:39  

Additional Information
 Earth MOID = 1.51933 au 
 Jupiter MOID = 1.72803 au 
 T_jup = 3.200 
[ 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 13.9   n/a MPO358832  
diameter diameter 9.659 km 0.318 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 11.791 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 0.057   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21217 (1994 VM1)          Discovered 1994-Nov-04 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1994 VM1 = 1983 VP = 1997 LE7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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