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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21911 (1999 VW23)
Classification: Main-belt Asteroid          SPK-ID: 2021911
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702675933756414 1.3684e-08  
a 2.779452438316087 1.1771e-08 au
q 2.306201760741948 4.1359e-08 au
i 9.490749542895442 1.2049e-06 deg
node 169.6378830031792 1.0685e-06 deg
peri 219.6653859148538 6.7691e-06 deg
M 258.833902331299 9.5484e-06 deg
tp 2459872.130607618510
(2022-Oct-19.63060762)
4.6568e-05 TDB
period 1692.533592660639
4.63
1.0752e-05
2.944e-08
d
yr
n .2126988802828339 1.3512e-09 deg/d
Q 3.252703115890226 1.3776e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2228  
   data-arc span      18189 days (49.80 yr)  
   first obs. used      1971-10-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44718  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:17  

Additional Information
 Earth MOID = 1.31834 au 
 Jupiter MOID = 2.22918 au 
 T_jup = 3.293 
[ 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 13.22   n/a MPO636392  
diameter diameter 6.374 km 0.284 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.29159 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.274   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21911 (1999 VW23)          Discovered 1999-Nov-14 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VW23 = 1971 UW2 = 1996 AM12 = 1998 MJ45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-24 13:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin