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JPL Small-Body Database Browser
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8 Flora
Classification: Main-belt Asteroid          SPK-ID: 2000008
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1564992508158695 2.4467e-08  
a 2.20176418937401 2.3826e-09 au
q 1.857189743263767 5.3548e-08 au
i 5.88695455961114 3.3184e-06 deg
node 110.8893298901322 2.501e-05 deg
peri 285.2874622174554 2.7342e-05 deg
M 194.8828951539766 1.2311e-05 deg
tp 2459147.823627917150
(2020-Oct-25.32362792)
4.129e-05 TDB
period 1193.313716552361
3.27
1.937e-06
5.303e-09
d
yr
n .301680936878935 4.8969e-10 deg/d
Q 2.546338635484252 2.7555e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2744  
   data-arc span      62655 days (171.54 yr)  
   first obs. used      1847-10-27  
   last obs. used      2019-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52919  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:01:45  

Additional Information
 Earth MOID = .874176 au 
 Jupiter MOID = 2.86902 au 
 T_jup = 3.641 
[ 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 6.49   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 147.491 km 1.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.865 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Hollis, A.J.; Bembrick, C.S.; Dumont, M.; Miles, R. (1987) J. Brit. Astron. Assoc. 97, 220-223.]
[Di Martino, M.; Zappala, V.; Cellino, A.; Barucci, M.A.; et al. (1989) Astron. Astrophys. 223, 352-360.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Piironen, J.; Lagerkvist, C.-I.; Erikson, A.; Oja, T.; et al. (1998) Astron. Astrophys. Suppl. Ser. 128, 525-540.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 133-136.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.226   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.885   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=8.07, mean=16.45, max.=32.13) deg.
U-B UB 0.489   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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