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6861 (1991 FA3)
Classification: Main-belt Asteroid          SPK-ID: 2006861
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1376009519378587 5.9846e-08  
a 3.141377302166998 4.2642e-08 AU
q 2.709120794992837 1.9694e-07 AU
i 10.71178233270031 8.866e-06 deg
node 21.68893307476775 3.7014e-05 deg
peri 257.2582587718671 5.4368e-05 deg
M 15.73417896146304 4.4037e-05 deg
tp 2456911.616701352395
(2014-Sep-11.11670135)
0.00024826 JED
period 2033.661088481886
5.57
4.1409e-05
1.134e-07
d
yr
n .177020646182859 3.6044e-09 deg/d
Q 3.57363380934116 4.851e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      985  
   data-arc span      15073 days (41.27 yr)  
   first obs. used      1974-03-21  
   last obs. used      2015-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47007  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:55:20  

Additional Information
 Earth MOID = 1.72057 AU 
 T_jup = 3.169 
[ 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 12.2 mag n/a MPO265994  
rotation period rot_per 19.4659 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.]

6861 (1991 FA3)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 FA3 = 1974 FK1 = 1976 SV9 = 1982 UY9 = 1987 RF3 = 1988 VG6 = 1993 TP11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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