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 ]  
101937 (1999 RD23)
Classification: Main-belt Asteroid          SPK-ID: 2101937
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1717950120973069 4.4695e-08  
a 2.335195383867092 1.1267e-08 au
q 1.934020464646069 1.0104e-07 au
i 23.510520859661 5.2405e-06 deg
node 174.1568526037783 8.6876e-06 deg
peri 53.77999670842338 1.6005e-05 deg
M 98.51504516260734 1.1804e-05 deg
tp 2458843.816251524158
(2019-Dec-26.31625152)
4.2697e-05 TDB
period 1303.416643004711
3.57
9.4332e-06
2.583e-08
d
yr
n .2761971791077542 1.9989e-09 deg/d
Q 2.736370303088114 1.3203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      952  
   data-arc span      10844 days (29.69 yr)  
   first obs. used      1991-04-20  
   last obs. used      2020-12-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54087  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:30  

Additional Information
 Earth MOID = .995366 au 
 Jupiter MOID = 2.34567 au 
 T_jup = 3.439 
[ 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 15.31   n/a E2021B55  

101937 (1999 RD23)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 RD23 = 1991 HR 
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-18 04:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin