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8509 (1991 FV2)
Classification: Main-belt Asteroid          SPK-ID: 2008509
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1822738202487438 4.6411e-08  
a 2.336945935139841 1.4101e-08 AU
q 1.910981871827129 1.0858e-07 AU
i 4.895070803770557 6.2461e-06 deg
node 20.10234659469359 6.5878e-05 deg
peri 240.5826117978298 6.8525e-05 deg
M 175.5492403842959 1.8846e-05 deg
tp 2456364.191274754074
(2013-Mar-12.69127475)
6.7155e-05 JED
period 1304.882553675951
3.57
1.181e-05
3.233e-08
d
yr
n .2758868980092141 2.497e-09 deg/d
Q 2.762909998452552 1.6671e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1137  
   data-arc span      21901 days (59.96 yr)  
   first obs. used      1955-03-23  
   last obs. used      2015-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51334  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:32:04  

Additional Information
 Earth MOID = .903139 AU 
 T_jup = 3.540 
[ 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 14.1 mag n/a MPO332899  
rotation period rot_per 9.0101 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.]

8509 (1991 FV2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla
Reference: 19980313/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 FV2 = 1959 LG = 1978 VQ1 = 1987 AU 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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