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8 Flora
Classification: Main-belt Asteroid          SPK-ID: 2000008
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1563371356652698 2.2772e-08  
a 2.201958126170457 1.9104e-09 AU
q 1.857710299870104 4.9999e-08 AU
i 5.887770404145354 3.0194e-06 deg
node 110.9223284911777 2.5381e-05 deg
peri 285.4669089459795 2.6974e-05 deg
M 71.83873403003587 1.0258e-05 deg
tp 2456762.340351662568
(2014-Apr-14.84035166)
3.3888e-05 JED
period 1193.471385027869
3.27
1.5532e-06
4.252e-09
d
yr
n .3016410820705128 3.9255e-10 deg/d
Q 2.546205952470812 2.2091e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2411  
   data-arc span      61202 days (167.56 yr)  
   first obs. used      1847-11-03  
   last obs. used      2015-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58505  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:26:36  

Additional Information
 Earth MOID = .875049 AU 
 T_jup = 3.641 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.49 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
magnitude slope G 0.28   n/a PDS3 (MPC 17257) Fit
diameter diameter 135.89 km 2.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
rotation period rot_per 12.865 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Pilcher, F. (2009) Minor Planet Bul. 36, 133-136.]
geometric albedo albedo 0.2426   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
B-V BV .885 mag .015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=8.07, mean=16.45, max.=32.13) deg.
U-B UB .489 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=8.07, mean=17.27, max.=32.13) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

8 Flora          Discovered 1847-Oct-18 by Hind, J. R. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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