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 ]  
21906 (1999 VH20)
Classification: Main-belt Asteroid          SPK-ID: 2021906
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1828720840554767 3.8206e-08  
a 2.657586808394005 1.2143e-08 au
q 2.171588370184651 1.0363e-07 au
i 10.76726697270534 4.3628e-06 deg
node 288.14762054906 2.1295e-05 deg
peri 83.37752221007169 2.4412e-05 deg
M 326.5177220828657 1.3488e-05 deg
tp 2459347.677733997143
(2021-May-13.17773400)		 5.9821e-05 TDB
period 1582.448612669126
4.33		 1.0846e-05
2.969e-08		 d
yr
n .2274955389500995 1.5592e-09 deg/d
Q 3.14358524660336 1.4363e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1477  
   data-arc span      16260 days (44.52 yr)  
   first obs. used      1976-05-31  
   last obs. used      2020-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48664  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:55:00  

Additional Information
 Earth MOID = 1.20131 au 
 Jupiter MOID = 2.46634 au 
 T_jup = 3.338 
[ 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 14.02   n/a E2021B10  
diameter diameter 5.204 km 0.407 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.197   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21906 (1999 VH20)          Discovered 1999-Nov-11 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VH20 = 1990 RR10 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 11:18 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin