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16 Psyche
Classification: Main-belt Asteroid          SPK-ID: 2000016
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1363528219578003 3.3108e-08  
a 2.922785182369126 5.7162e-09 AU
q 2.524255174776652 9.6758e-08 AU
i 3.09894034095183 4.4691e-06 deg
node 150.2744675548355 7.3653e-05 deg
peri 227.1228564369788 7.5307e-05 deg
M 334.6557090617496 1.7109e-05 deg
tp 2457128.990617692843
(2015-Apr-16.49061769)
8.6893e-05 JED
period 1825.129867792487
5.00
5.3542e-06
1.466e-08
d
yr
n .1972462378446656 5.7864e-10 deg/d
Q 3.3213151899616 6.4956e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2493  
   data-arc span      58859 days (161.15 yr)  
   first obs. used      1852-03-17  
   last obs. used      2013-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6037  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2013-Jul-16 08:47:02  

Additional Information
 Earth MOID = 1.52698 AU 
 T_jup = 3.263 
[ 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 5.90 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 32
magnitude slope G 0.20   n/a PDS3 (MPC 17257) Fit
diameter diameter 253.16 km 4.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 32
GM GM 4.49 km^3/s^2 0.37 Kuzmanoski and Kovacevic [A&A, v.395, p.L17-L19 (2002)]  
bulk density density 6.98 g/cm^3 0.58 Kuzmanoski and Kovacevic [A&A, v.395, p.L17-L19 (2002)]  
rotation period rot_per 4.196 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Van Houten-Groeneveld, I.; van Houten, C.J. (1958) Astrophys. J. 127, 253-273.]
[Taylor, R.C.; Gehrels, T.; Capen, R.C. (1976) Astron. J. 81, 778-786.]
[Chang, Y.C.; Zhou, X.-h.; Yang, X.-y.; Zhang, Y.-y.; et al. (1981) Acta Astron. Sin. 22, 169-173; Chin. Astron. Astrophys. 5, 434-437.]
[Zhou, X.-h.; Yang, X.-y. (1981) Acta Astron. Sin. 22, 378-382; Chin. Astron. Astrophys. 6, 57-59 (1982, 1982ChA&A...6...57Z).]
[Zhou, X.-z.; Yang, X.-y.; Wu, Z.-x. (1982) Acta Astron. Sin. 23, 349-352; Chin. Astron. Astrophys. 7, 129-131 (1983, 1983ChA&A...7..129Z).]
[Lupishko, D.F.; Bel'skaya, I.N.; Tupieva, F.A.; Chernova, G.P. (1982) Astron. Vestn. 16, 101-108; Solar System Res. 16, 75-80.]
[Lupishko, D.F.; Bel'skaya, I.N. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 55-61.]
[Tedesco, E.F.; Taylor, R.C.; Drummond, J.; Harwood, D.; et al. (1983) Icarus 54, 30-37.]
[Tedesco, E.F.; Taylor, R.C. (1985) Icarus 61, 2, 241-251.]
[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.]
[Broglia, P.; Manara, A. (1992) Astron. Astrophys. 257, 770-772.]
[De Angelis, G. (1993) Planet. Space Sci. 41, 285-290.]
[Piironen, J.; Magnusson, P.; Lagerkvist, C.-I.; Williams, I.P.; et al. (1997) Astron. Astrophys. Suppl. Ser. 121, 489-497.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Proyecto ECLA (Silvia Alonso Perez) (2011) http://www.geocities.com/proyectoecla/]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.1203   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 32
B-V BV .729 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=.95, mean=9.89, max.=21.42) deg.
U-B UB .299 mag .058 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=71; phase (min.=.95, mean=9.30, max.=21.42) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

16 Psyche          Discovered 1852-Mar-17 by De Gasparis, A. at Naples
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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