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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2512215857717401 7.5001e-08  
a 2.918458663422395 3.6205e-08 AU
q 2.185278849988147 2.1984e-07 AU
i 12.51681744341982 8.215e-06 deg
node 302.5384771959877 3.8624e-05 deg
peri 356.5613360568628 4.3143e-05 deg
M 150.0806214216217 2.4259e-05 deg
tp 2456241.309325172310
(2012-Nov-09.80932517)
0.00011994 JED
period 1821.078833157027
4.99
3.3887e-05
9.278e-08
d
yr
n .1976850169500367 3.6786e-09 deg/d
Q 3.651638476856642 4.53e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      856  
   data-arc span      22443 days (61.45 yr)  
   first obs. used      1953-10-12  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .40757  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:28  

Additional Information
 Earth MOID = 1.17091 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 12.8 mag n/a MPO319347  
diameter diameter 13.32 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
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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