Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 100 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02334438484739308 2.4552e-08  
a 2.353068331126344 3.5318e-09 au
q 2.298137398432317 5.8131e-08 au
i 10.03406431117894 2.6724e-06 deg
node 142.3808968100403 1.4123e-05 deg
peri 121.0236915988793 4.9423e-05 deg
M 125.7439099826142 4.7623e-05 deg
tp 2457139.994634162921
(2015-Apr-27.49463416)
0.0001742 JED
period 1318.409231304085
3.61
2.9683e-06
8.127e-09
d
yr
n .2730563405141751 6.1476e-10 deg/d
Q 2.407999263820371 3.6143e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2307  
   data-arc span      43594 days (119.35 yr)  
   first obs. used      1896-07-26  
   last obs. used      2015-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55272  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 17:37:31  

Additional Information
 Earth MOID = 1.29505 au 
 Jupiter MOID = 2.61483 au 
 T_jup = 3.535 
[ 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 LCDB (Rev. 2016-February); Warner et al., 2009 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]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2015) Astron. Astrophys. 586, A108.]
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-01 09:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin