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 ]  
21055 (1990 YR)
Classification: Main-belt Asteroid          SPK-ID: 2021055
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1846017758605326 1.9268e-08  
a 2.784392805624427 1.1672e-08 au
q 2.270388949012867 5.5145e-08 au
i 7.336478528041227 5.3253e-07 deg
node 29.34307315490049 2.4189e-06 deg
peri 11.42832573379384 6.7449e-06 deg
M 243.0602082974605 9.0163e-06 deg
tp 2459947.756846612827
(2023-Jan-03.25684661)
4.4417e-05 TDB
period 1697.048215079967
4.65
1.0671e-05
2.922e-08
d
yr
n .2121330418317174 1.3339e-09 deg/d
Q 3.298396662235987 1.3827e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2331  
   data-arc span      11147 days (30.52 yr)  
   first obs. used      1990-12-23  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44818  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:04:53  

Additional Information
 Earth MOID = 1.27833 au 
 Jupiter MOID = 2.13503 au 
 T_jup = 3.295 
[ 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 12.93   n/a E2021B10  
diameter diameter 8.268 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.149   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21055 (1990 YR)          Discovered 1990-Dec-23 by Hioki, T., Hayakawa, S. at Okutama
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 YR = 1999 XJ119 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-27 03:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin