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JPL Small-Body Database Browser
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258 Tyche
Classification: Main-belt Asteroid          SPK-ID: 2000258
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2041193954326184 3.8323e-08  
a 2.615531508281396 6.3077e-09 au
q 2.081650798076033 1.0113e-07 au
i 14.32229996115368 4.3437e-06 deg
node 207.5643950708577 1.7379e-05 deg
peri 155.6140486711632 2.028e-05 deg
M 30.13502900838515 1.0467e-05 deg
tp 2458471.167559070431
(2018-Dec-18.66755907)		 4.4855e-05 TDB
period 1545.035139063236
4.23		 5.5891e-06
1.53e-08		 d
yr
n .2330044093484309 8.4288e-10 deg/d
Q 3.149412218486759 7.5952e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2485  
   data-arc span      48752 days (133.48 yr)  
   first obs. used      1886-05-09  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50937  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:22  

Additional Information
 Earth MOID = 1.08817 au 
 Jupiter MOID = 2.34844 au 
 T_jup = 3.334 
[ 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 8.50   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 LCDB (Rev. 2019-January); Warner et al., 2009 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.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1676   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
B-V BV 0.876   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=7.39, mean=14.10, max.=25.73) deg.
U-B UB 0.459   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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