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29 Amphitrite (A854 EB)
Classification: Main-belt Asteroid          SPK-ID: 2000029
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 146 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07295912058897963 2.8934e-08  
a 2.554818379325562 3.9216e-09 au
q 2.368421077105406 7.4021e-08 au
i 6.081867746124153 2.9296e-06 deg
node 356.3358735874158 3.0123e-05 deg
peri 63.27356271407629 3.802e-05 deg
M 20.89747046293104 2.2887e-05 deg
tp 2458913.917585266111
(2020-Mar-05.41758527)
9.4795e-05 TDB
period 1491.552260331719
4.08
3.4343e-06
9.403e-09
d
yr
n .2413592936528664 5.5572e-10 deg/d
Q 2.741215681545717 4.2077e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2413  
   data-arc span      60357 days (165.25 yr)  
   first obs. used      1855-07-25  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56404  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:12  

Additional Information
 Earth MOID = 1.38747 au 
 Jupiter MOID = 2.47584 au 
 T_jup = 3.427 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.9   n/a MPO492748 IRAS observations used: 11
magnitude slope G 0.20   n/a PDS3 (MPC 17257) Fit
diameter diameter 189.559 km 1.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.3921 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 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.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.216   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.838   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=60; phase (min.=.46, mean=10.77, max.=24.12) deg.
U-B UB 0.449   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A854 EB)          Discovered 1854-Mar-01 by Marth, A. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A854 EB = A899 NG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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