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51 Nemausa
Classification: Main-belt Asteroid          SPK-ID: 2000051
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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06717407851208262 1.8741e-08  
a 2.365798309822059 1.8091e-09 AU
q 2.20687798841432 4.4329e-08 AU
i 9.978497431513929 2.0986e-06 deg
node 176.0269197383061 1.6319e-05 deg
peri 2.041389557190566 2.7608e-05 deg
M 328.9685962939421 2.2665e-05 deg
tp 2456915.068156038957
(2014-Sep-14.56815604)
8.3703e-05 JED
period 1329.122477497624
3.64
1.5246e-06
4.174e-09
d
yr
n .2708553997805996 3.1069e-10 deg/d
Q 2.524718631229799 1.9307e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      4449  
   data-arc span      54969 days (150.50 yr)  
   first obs. used      1863-09-12  
   last obs. used      2014-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58468  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:32:28  

Additional Information
 Earth MOID = 1.21107 AU 
 T_jup = 3.525 
[ 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 7.35 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
magnitude slope G 0.08   n/a PDS3 (MPC 17257) Fit
diameter diameter 147.86 km 2.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
rotation period rot_per 7.783 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Chang, Y.C.; Chang, C.-s. (1963) Acta Astron. Sin. 11, 139-149.]
[Wamsteker, W.; Sather, R.E. (1974) Astron. J. 79, 1465-1470.]
[Gammelgaard, P.; Kristensen, L.K. (1983) Messenger 32, 29-30.]
[Kristensen, L.K.; Gammelgaard, P. (1985) Astron. Nachr. 306, 241-249.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Gammelgaard, P.; Kristensen, L.K. (1991) Astron. Astrophys. 244, 544-552.]
[Kristensen, L.K. (1991) Astron. Nachr. 312, 209-220.]
[Kristensen, L.K. (1993) Astron. Nachr. 314, 381-390.]
[Kristensen, L.K.; Gammelgaard, P. (1993) Astron. Astrophys. 272, 345-354.]
[Kristensen, L.K.; Gammelgaard, P. (1997) Astron. Astrophys. 322, 679-686.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planetary and Space Science 53, 1147-1165.]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.0928   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
B-V BV .789 mag .012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=8; phase (min.=9.97, mean=15.82, max.=22.24) deg.
U-B UB .482 mag .011 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=9.97, mean=13.87, max.=16.71) deg.
Tholen spectral type spec_T CU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

51 Nemausa          Discovered 1858-Jan-22 by Laurent at Nimes
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1949 HC1 = 1954 QX 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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