Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 156 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0731902410440365 2.833e-08  
a 2.554723625696025 3.8024e-09 au
q 2.367742787730438 7.2341e-08 au
i 6.082551071260857 2.9245e-06 deg
node 356.3290028386385 2.975e-05 deg
peri 63.16888706957658 3.7569e-05 deg
M 116.5598941838901 2.2792e-05 deg
tp 2458913.595828447143
(2020-Mar-05.09582845)
9.425e-05 TDB
period 1491.469282605576
4.08
3.3298e-06
9.116e-09
d
yr
n .2413727216500799 5.3888e-10 deg/d
Q 2.741704463661612 4.0807e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2575  
   data-arc span      60638 days (166.02 yr)  
   first obs. used      1855-07-25  
   last obs. used      2021-08-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:07:03  

Additional Information
 Earth MOID = 1.38631 au 
 Jupiter MOID = 2.47549 au 
 T_jup = 3.427 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451253.5 (1999-Mar-16.0) TDB
Reference: JPL 156 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07303459339335681 2.7708e-08  
q 2.369355081972655 7.0794e-08 au
tp 2451452.333804003086
(1999-Sep-30.83380400)
9.4668e-05 TDB
node 356.5929715795911 2.9563e-05 deg
peri 62.22471148390261 3.7721e-05 deg
i 6.10596809141431 2.9319e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2575  
   data-arc span      60638 days (166.02 yr)  
   first obs. used      1855-07-25  
   last obs. used      2021-08-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:07:03  

Additional Information
 Jupiter MOID = 2.47549 au 
 T_jup = 3.427 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.677286028033013E-16 -1.959195880500669E-15 7.367293784556808E-13 1.399522951972389E-15 1.926105585180519E-13 -1.17871282026628E-15
q -1.959195880500669E-15 5.011837042497396E-15 -1.879148202095914E-12 -3.699577544251934E-15 -4.917754406644094E-13 2.947836048075583E-15
tp 7.367293784556808E-13 -1.879148202095914E-12 8.962083300694697E-9 8.821237563768494E-12 2.228152194062678E-9 -2.486973082142434E-12
node 1.399522951972389E-15 -3.699577544251934E-15 8.821237563768494E-12 8.739831271639496E-10 -8.666918224274755E-10 -1.215527957632491E-11
peri 1.926105585180519E-13 -4.917754406644094E-13 2.228152194062678E-9 -8.666918224274755E-10 1.422894751983499E-9 1.147966214502118E-11
i -1.17871282026628E-15 2.947836048075583E-15 -2.486973082142434E-12 -1.215527957632491E-11 1.147966214502118E-11 8.595906656159848E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.05   n/a MPO636060 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. 2020-October); 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.]
[Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.]
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-18 10:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin