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 ]  
21779 (1999 RE231)
Classification: Main-belt Asteroid          SPK-ID: 2021779
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 .1198368897427372 4.5401e-08  
a 2.552897711615327 1.0104e-08 au
q 2.246966390023995 1.1448e-07 au
i 10.44809465132196 4.869e-06 deg
node 120.2232162514205 1.7419e-05 deg
peri 178.8635576301071 2.324e-05 deg
M 124.7192760919334 1.3985e-05 deg
tp 2458684.345606307551
(2019-Jul-19.84560631)
5.7582e-05 TDB
period 1489.87059219549
4.08
8.8448e-06
2.422e-08
d
yr
n .2416317241818298 1.4345e-09 deg/d
Q 2.858829033206659 1.1314e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1368  
   data-arc span      10252 days (28.07 yr)  
   first obs. used      1992-12-24  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:25  

Additional Information
 Earth MOID = 1.2293 au 
 Jupiter MOID = 2.34953 au 
 T_jup = 3.406 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO347690  
diameter diameter 3.115 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.200   0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21779 (1999 RE231)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RE231 = 1998 HU114 = 1999 VZ202 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 20:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin