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258 Tyche
Classification: Main-belt Asteroid          SPK-ID: 2000258
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046877761147877 3.42e-08  
a 2.615541313100805 7.7611e-09 AU
q 2.08017197838585 8.9324e-08 AU
i 14.29783192481194 4.5888e-06 deg
node 207.6460408711281 2.0838e-05 deg
peri 154.6830749266417 2.4214e-05 deg
M 331.8496940109872 1.3998e-05 deg
tp 2456921.315156923761
(2014-Sep-20.81515692)
6.035e-05 JED
period 1545.043826860344
4.23
6.8769e-06
1.883e-08
d
yr
n .233003099162274 1.0371e-09 deg/d
Q 3.15091064781576 9.3497e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1293  
   data-arc span      46804 days (128.14 yr)  
   first obs. used      1886-05-06  
   last obs. used      2014-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60311  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 11:54:14  

Additional Information
 Earth MOID = 1.08651 AU 
 T_jup = 3.334 
[ 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 8.50 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
magnitude slope G 0.23   n/a PDS3 (MPC 17258) Fit
diameter diameter 64.78 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
rotation period rot_per 10.041 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I.; et al. (1994) Astron. Astrophys. Suppl. Ser. 105, 281-300.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planetary and Space Sci. 49, 657-671.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.1676   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
B-V BV .876 mag .025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=7.39, mean=14.10, max.=25.73) deg.
U-B UB .459 mag .036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=7.39, mean=14.10, max.=25.73) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
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)

258 Tyche          Discovered 1886-May-04 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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