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 ]  
51 Nemausa
Classification: Main-belt Asteroid          SPK-ID: 2000051
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]
Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06691852205428137 1.7531e-08  
a 2.365163323908779 2.3168e-09 AU
q 2.206890089855812 4.1719e-08 AU
i 9.980030923937193 2.0296e-06 deg
node 176.024451412965 1.5739e-05 deg
peri 2.097717995855777 2.5832e-05 deg
M 23.10062102084175 2.0518e-05 deg
tp 2456915.246683023839
(2014-Sep-14.74668302)
7.5722e-05 JED
period 1328.58740393723
3.64
1.9521e-06
5.345e-09
d
yr
n .2709644837314808 3.9813e-10 deg/d
Q 2.523436557961746 2.4718e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      4580  
   data-arc span      55004 days (150.59 yr)  
   first obs. used      1863-09-12  
   last obs. used      2014-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50303  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:33:24  

Additional Information
 Earth MOID = 1.21175 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. 2014-Mar-01) 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Oct-31 14:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin