Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
9858 (1991 OL1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2009858
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .186032734659104 6.4444e-08  
a 3.217347103438829 3.1935e-08 AU
q 2.618815223438557 2.2081e-07 AU
i 2.780337103046956 6.0999e-06 deg
node 113.4165895655897 0.00011802 deg
peri 246.0749914129755 0.00011901 deg
M 344.8224283474773 1.5622e-05 deg
tp 2457089.367936054819
(2015-Mar-07.86793605)
9.1948e-05 JED
period 2107.87718300229
5.77
3.1384e-05
8.592e-08
d
yr
n .1707879391185615 2.5428e-09 deg/d
Q 3.815878983439102 3.7876e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      994  
   data-arc span      14060 days (38.49 yr)  
   first obs. used      1977-02-19  
   last obs. used      2015-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53676  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:29:06  

Additional Information
 Earth MOID = 1.61711 AU 
 T_jup = 3.161 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2 mag n/a MPO302126  
rotation period rot_per 21.2075 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

9858 (1991 OL1)          Discovered 1991-Jul-18 by Debehogne, H. at La Silla
Reference: 19990106/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 OL1 = 1977 DH1 = 1986 TK13 = 1992 WJ4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Sep-04 16:34 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin