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 ]  
85161 (1988 SA2)
Classification: Main-belt Asteroid          SPK-ID: 2085161
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .210841972000836 3.6574e-08  
a 2.213439847657572 1.0047e-08 au
q 1.74675382527222 8.2223e-08 au
i 6.399237670457254 4.8185e-06 deg
node 91.77998867733899 4.0417e-05 deg
peri 217.3668838510787 4.3072e-05 deg
M 252.2513942458028 1.7605e-05 deg
tp 2459360.505529574144
(2021-May-26.00552957)
6.0454e-05 TDB
period 1202.818261447836
3.29
8.1893e-06
2.242e-08
d
yr
n .2992970854688113 2.0377e-09 deg/d
Q 2.680125870042925 1.2165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      539  
   data-arc span      11461 days (31.38 yr)  
   first obs. used      1988-09-15  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58739  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:31  

Additional Information
 Earth MOID = .736991 au 
 Jupiter MOID = 2.58231 au 
 T_jup = 3.618 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457010.5 (2014-Dec-19.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2114687834063535 3.6592e-08  
q 1.745452234760007 8.2311e-08 au
tp 2456954.216171344121
(2014-Oct-23.71617134)
5.0498e-05 TDB
node 91.83861245266652 4.0416e-05 deg
peri 217.2652480224319 4.3046e-05 deg
i 6.399485669002535 4.8179e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      539  
   data-arc span      11461 days (31.38 yr)  
   first obs. used      1988-09-15  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58739  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:31  

Additional Information
 Jupiter MOID = 2.58231 au 
 T_jup = 3.618 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.338987464656692E-15 -2.998205143047859E-15 -4.736347121318153E-13 5.608568111742901E-15 -1.101824980179564E-13 -5.873923970642274E-16
q -2.998205143047859E-15 6.775086319003176E-15 1.242192988631326E-12 -1.412362159699912E-14 2.998860075216822E-13 1.844530196426359E-15
tp -4.736347121318153E-13 1.242192988631326E-12 2.55002206312099E-9 -1.834819034210783E-11 7.651565592733699E-10 5.827256174692054E-12
node 5.608568111742901E-15 -1.412362159699912E-14 -1.834819034210783E-11 1.633485966617996E-9 -1.627877291466155E-9 -5.222492323981637E-11
peri -1.101824980179564E-13 2.998860075216822E-13 7.651565592733699E-10 -1.627877291466155E-9 1.852946726489762E-9 5.36130692452095E-11
i -5.873923970642274E-16 1.844530196426359E-15 5.827256174692054E-12 -5.222492323981637E-11 5.36130692452095E-11 2.321229858538003E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO453282  

85161 (1988 SA2)          Discovered 1988-Sep-16 by Bus, S. J. at Cerro Tololo
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-24 18:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin