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287 Nephthys
Classification: Main-belt Asteroid          SPK-ID: 2000287
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02294172187611618 2.462e-08  
a 2.352756535887414 3.5838e-09 AU
q 2.29878024979887 5.824e-08 AU
i 10.0343148063417 2.6746e-06 deg
node 142.3838748117335 1.4204e-05 deg
peri 120.8673163521734 5.0352e-05 deg
M 267.4366786279314 4.8491e-05 deg
tp 2457139.422451094332
(2015-Apr-26.92245109)
0.00017771 JED
period 1318.147194648713
3.61
3.0117e-06
8.246e-09
d
yr
n .273110621834567 6.2401e-10 deg/d
Q 2.406732821975957 3.666e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2238  
   data-arc span      42529 days (116.44 yr)  
   first obs. used      1897-12-16  
   last obs. used      2014-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55529  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:10:31  

Additional Information
 Earth MOID = 1.29529 AU 
 T_jup = 3.536 
[ 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 8.30 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
magnitude slope G 0.22   n/a PDS3 (MPC 17258) Fit
diameter diameter 67.60 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 7.605 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Blanco, C.; Di Martino, M.; De Sanctis, G.; Riccioli, D. (1996) Planet. Space Sci. 44, 93-106.]
[Behrend, R. (2000) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Fauerbach, M.; Bennett, T. (2005) Minor Planet Bul. 32, 34-35.]
[Fauerbach, M.; Marks, S.A.; Lucas, M.P. (2008) Minor Planet Bul. 35, 44-46.]
[Alton, K. (2008) Minor Planet Bul. 35, 33-34.]
[Alton, K.B. (2011) Minor Planet Bul. 38, 8-9.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Collaborative Asteroid Lightcurve Link (CALL) (2011) http://www.minorplanetobserver.com/DATA/submi ssions_results.htm]
geometric albedo albedo 0.1851   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
B-V BV .873 mag .014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=7.92, mean=14.93, max.=21.12) deg.
U-B UB .490 mag .036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=7.92, mean=14.93, max.=21.12) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

287 Nephthys          Discovered 1889-Aug-25 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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