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 ]  
101158 (1998 RA77)
Classification: Mars-crossing Asteroid          SPK-ID: 2101158
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2852197379275431 2.5981e-08  
a 2.293703503797939 6.7108e-09 au
q 1.639493991561203 6.0114e-08 au
i 4.769136215233279 7.4233e-06 deg
node 33.02836222999095 3.8994e-05 deg
peri 272.2962371802033 4.3739e-05 deg
M 177.6802102482137 1.6988e-05 deg
tp 2458574.259857873252
(2019-Mar-31.75985787)
5.8499e-05 TDB
period 1268.832645181406
3.47
5.5685e-06
1.525e-08
d
yr
n .2837253607614504 1.2452e-09 deg/d
Q 2.947913016034674 8.6249e-09 au
  Orbit Determination Parameters
   # obs. used (total)      644  
   data-arc span      10781 days (29.52 yr)  
   first obs. used      1991-09-04  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50513  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:28  

Additional Information
 Earth MOID = .631638 au 
 Jupiter MOID = 2.33526 au 
 T_jup = 3.537 
[ 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 16.4   n/a MPO337990  

101158 (1998 RA77)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 RA77 = 2001 HE13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-18 19:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin