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 ]  
74223 (1998 RD81)
Classification: Main-belt Asteroid          SPK-ID: 2074223
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689581874036259 3.9449e-08  
a 2.718634057823358 1.52e-08 au
q 2.259298575199759 1.0958e-07 au
i 4.253406988655102 4.8381e-06 deg
node 229.4690529986818 6.009e-05 deg
peri 96.63968756583202 6.169e-05 deg
M 329.4058808503935 1.4409e-05 deg
tp 2459139.642566495881
(2020-Oct-17.14256650)
6.5964e-05 TDB
period 1637.286031788285
4.48
1.3731e-05
3.759e-08
d
yr
n .2198760589234362 1.844e-09 deg/d
Q 3.177969540446957 1.7768e-08 au
  Orbit Determination Parameters
   # obs. used (total)      494  
   data-arc span      8473 days (23.20 yr)  
   first obs. used      1997-04-06  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6167  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:48:58  

Additional Information
 Earth MOID = 1.25254 au 
 Jupiter MOID = 2.17706 au 
 T_jup = 3.335 
[ 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 15.5   n/a MPO436302  

74223 (1998 RD81)          Discovered 1998-Sep-15 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 RD81 = 1997 HC13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-03 21:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin