Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
21907 (1999 VM20)
Classification: Main-belt Asteroid          SPK-ID: 2021907
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1254983194852667 1.4526e-08  
a 2.668575872342609 1.1718e-08 au
q 2.333674084944682 4.3128e-08 au
i 12.73858484294307 3.6449e-07 deg
node 319.6959664334806 3.9263e-06 deg
peri 141.4287476467942 1.0866e-05 deg
M 292.3386138288673 1.1855e-05 deg
tp 2459695.765152923641
(2022-Apr-26.26515292)
5.3422e-05 TDB
period 1592.273838138942
4.36
1.0488e-05
2.871e-08
d
yr
n .2260917634750376 1.4892e-09 deg/d
Q 3.003477659740537 1.3189e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2630  
   data-arc span      14076 days (38.54 yr)  
   first obs. used      1982-12-23  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39323  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:04:42  

Additional Information
 Earth MOID = 1.36392 au 
 Jupiter MOID = 2.12866 au 
 T_jup = 3.336 
[ 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 13.44   n/a E2021B10  
diameter diameter 6.633 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.278   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21907 (1999 VM20)          Discovered 1999-Nov-11 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VM20 = 1982 YK1 = 1986 TJ11 = 2001 AL17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-31 07:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin