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 ]  
20995 (1985 VY)
Classification: Jupiter Trojan          SPK-ID: 2020995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1145572611775625 5.4702e-08  
a 5.092337689434804 9.5345e-08 au
q 4.508973430741876 3.3177e-07 au
i 20.36819153781571 5.6124e-06 deg
node 72.77508098989489 1.8559e-05 deg
peri 10.72283875934328 3.7143e-05 deg
M 278.5447627898912 3.4922e-05 deg
tp 2459950.209389943772
(2023-Jan-05.70938994)
0.00042348 TDB
period 4197.340675564662
11.49
0.00011788
3.227e-07
d
yr
n .08576859202680033 2.4088e-09 deg/d
Q 5.675701948127732 1.0627e-07 au
  Orbit Determination Parameters
   # obs. used (total)      843  
   data-arc span      12777 days (34.98 yr)  
   first obs. used      1985-11-01  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56432  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:31  

Additional Information
 Earth MOID = 3.52674 au 
 Jupiter MOID = .317379 au 
 T_jup = 2.864 
[ 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 11.7   n/a MPO502323  
diameter diameter 26.203 km 2.566 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 10.474 h n/a LCDB (Rev. 2019-August); 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. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

20995 (1985 VY)          Discovered 1985-Nov-01 by West, R. M. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1985 VY = 1999 VB157 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-30 06:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin