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29 Amphitrite
Classification: Main-belt Asteroid          SPK-ID: 2000029
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 139 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07220913666102272 3.2337e-08  
a 2.555042630746509 3.8781e-09 AU
q 2.370545208248195 8.2666e-08 AU
i 6.08918552365133 3.2474e-06 deg
node 356.4271217145698 3.3744e-05 deg
peri 61.90623993865081 4.3442e-05 deg
M 211.2928141524472 2.6411e-05 deg
tp 2457416.704842919083
(2016-Jan-29.20484292)
0.00010966 JED
period 1491.748648100185
4.08
3.3963e-06
9.299e-09
d
yr
n .2413275188541164 5.4944e-10 deg/d
Q 2.739540053244823 4.1581e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1852  
   data-arc span      57626 days (157.77 yr)  
   first obs. used      1855-07-25  
   last obs. used      2013-05-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .66549  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2013-Jul-16 08:47:07  

Additional Information
 Earth MOID = 1.38794 AU 
 T_jup = 3.426 
[ 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 5.85 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
magnitude slope G 0.20   n/a PDS3 (MPC 17257) Fit
diameter diameter 212.22 km 6.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 5.3921 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.]
[Debehogne, H.; Surdej, A.; Surdej, J. (1978) Astron. Astrophys. Suppl. Ser. 32, 127-133.]
[Van Houten-Groeneveld, I.; van Houten, C.J.; Zappala, V. (1979) Astron. Astrophys. Suppl. Ser. 35, 223-232.]
[Tedesco, E.F.; Sather, R.E. (1981) Astron. J. 86, 1553-1558.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Behrend, R. (2006) 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]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.1793   0.012 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV .838 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=60; phase (min.=.46, mean=10.77, max.=24.12) deg.
U-B UB .449 mag .049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=46; phase (min.=.46, mean=8.83, max.=23.91) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

29 Amphitrite          Discovered 1854-Mar-01 by Marth, A. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A899 NG 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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