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21018 (1988 VV1)
Classification: Main-belt Asteroid          SPK-ID: 2021018
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2479585364353357 2.6028e-08  
a 2.921927762091636 1.9314e-08 au
q 2.197410830633618 7.906e-08 au
i 12.46663113617776 2.2864e-06 deg
node 302.3326051759328 6.3293e-06 deg
peri 357.2331000405562 1.3439e-05 deg
M 262.0348464041077 1.291e-05 deg
tp 2459892.945709904426
(2022-Nov-09.44570990)
6.7506e-05 TDB
period 1824.326804026846
4.99
1.8088e-05
4.952e-08
d
yr
n .1973330651094804 1.9566e-09 deg/d
Q 3.646444693549654 2.4103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2029  
   data-arc span      24714 days (67.66 yr)  
   first obs. used      1953-10-12  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41442  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:29:24  

Additional Information
 Earth MOID = 1.18142 au 
 Jupiter MOID = 1.60574 au 
 T_jup = 3.198 
[ 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 12.96   n/a MPCxxxxx  
diameter diameter 15.082 km 0.304 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.172 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 0.071   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21018 (1988 VV1)          Discovered 1988-Nov-02 by Oshima, Y. at Gekko
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1988 VV1 = 2000 AL9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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