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21018 (1988 VV1)
Classification: Main-belt Asteroid          SPK-ID: 2021018
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2480182008164066 6.4112e-08  
a 2.92423738464288 3.3848e-08 au
q 2.198973289743678 1.9349e-07 au
i 12.4679542208133 7.3516e-06 deg
node 302.4306116627068 3.0013e-05 deg
peri 356.7588883328734 3.4845e-05 deg
M 268.1988812848876 2.3479e-05 deg
tp 2458066.260696228063
(2017-Nov-08.76069623)
0.00012286 JED
period 1826.490275815125
5.00
3.1713e-05
8.683e-08
d
yr
n .1970993247359828 3.4222e-09 deg/d
Q 3.649501479542081 4.2243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      22822 days (62.48 yr)  
   first obs. used      1953-10-12  
   last obs. used      2016-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .42886  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:35:57  

Additional Information
 Earth MOID = 1.1831 au 
 Jupiter MOID = 1.59279 au 
 T_jup = 3.198 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a MPO358830  
diameter diameter 13.32 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 5.1724 h n/a LCDB (Rev. 2016-February); 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. (2016) Astron. J. 150, A75.]
geometric albedo albedo 0.0908   0.034 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5

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

[ show close-approach data ]
Alternate Designations
 1988 VV1 = 2000 AL9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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