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72 Feronia (A861 KA)
Classification: Main-belt Asteroid          SPK-ID: 2000072
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1204859395372927 3.2561e-08  
a 2.266467800040188 3.7847e-09 au
q 1.993390297721326 7.3412e-08 au
i 5.415447831777402 3.6817e-06 deg
node 207.960674806788 3.6186e-05 deg
peri 102.8993673588942 3.9441e-05 deg
M 122.3153701539618 1.6995e-05 deg
tp 2458577.050825967232
(2019-Apr-03.55082597)
5.8459e-05 TDB
period 1246.300464609753
3.41
3.1217e-06
8.547e-09
d
yr
n .2888549031494784 7.2352e-10 deg/d
Q 2.539545302359051 4.2407e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2963  
   data-arc span      56474 days (154.62 yr)  
   first obs. used      1865-06-23  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49458  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:16:26  

Additional Information
 Earth MOID = .987797 au 
 Jupiter MOID = 2.68656 au 
 T_jup = 3.600 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.1   n/a MPO502153 IRAS observations used: 21
diameter diameter 74.966 km 1.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 8.097 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo albedo 0.083   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.785   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.28, mean=7.77, max.=15.33) deg.
U-B UB 0.375   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.28, mean=7.77, max.=15.33) deg.
Tholen spectral type spec_T TDG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

72 Feronia (A861 KA)          Discovered 1861-May-29 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A861 KA = 1927 TK = 1950 LJ = A902 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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