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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
85157 (1987 SP5)
Classification: Main-belt Asteroid          SPK-ID: 2085157
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .226716148732918 3.4235e-08  
a 2.264493785022244 7.6252e-09 au
q 1.751096475252372 7.573e-08 au
i 6.191473990565841 4.3085e-06 deg
node 3.835863657888972 3.5392e-05 deg
peri 53.03328951826724 3.6839e-05 deg
M 298.4676734634764 1.0622e-05 deg
tp 2459609.243334395788
(2022-Jan-29.74333440)
3.7298e-05 TDB
period 1244.67259233281
3.41
6.2868e-06
1.721e-08
d
yr
n .2892326883532279 1.4609e-09 deg/d
Q 2.777891094792115 9.354e-09 au
  Orbit Determination Parameters
   # obs. used (total)      779  
   data-arc span      12366 days (33.86 yr)  
   first obs. used      1987-09-29  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:53:43  

Additional Information
 Earth MOID = .770276 au 
 Jupiter MOID = 2.6111 au 
 T_jup = 3.575 
[ 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 16.03   n/a E2021B10  

85157 (1987 SP5)          Discovered 1987-Sep-30 by Jensen, P. at Brorfelde
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1987 SP5 = 1999 HA6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-22 06:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin