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JPL Small-Body Database Browser
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2245 Hekatostos (1968 BC)
Classification: Main-belt Asteroid          SPK-ID: 2002245
[ 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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1336888171885389 4.97e-08  
a 2.63598730337727 1.1189e-08 au
q 2.283585278664756 1.3076e-07 au
i 11.85142705309879 4.8266e-06 deg
node 85.18231389571038 2.0003e-05 deg
peri 316.8194987582741 2.4758e-05 deg
M 145.1959178688918 1.5427e-05 deg
tp 2458370.028725974548
(2018-Sep-08.52872597)		 6.608e-05 TDB
period 1563.195866526429
4.28		 9.9528e-06
2.725e-08		 d
yr
n .2302974359828333 1.4663e-09 deg/d
Q 2.988389328089783 1.2685e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2079  
   data-arc span      22341 days (61.17 yr)  
   first obs. used      1958-12-04  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41703  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:16:22  

Additional Information
 Earth MOID = 1.30884 au 
 Jupiter MOID = 2.39804 au 
 T_jup = 3.355 
[ 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 11.7   n/a MPO384769  
diameter diameter 29.28 km 1.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
rotation period rot_per 20.61 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Klinglesmith, D.A. III; DeHart, A.; Hanowell, J.; Hendrickx, S. (2015) Minor Planet Bull. 42, 158-159.]
geometric albedo albedo 0.0622   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10

2245 Hekatostos           Discovered 1968 Jan. 24 by L. I. Chernykh at the Crimean Astrophysical Observatory.
The Greek ordinal number acknowledges this as the 100th minor planet to be numbered as a result of the joint observational program of the Institute for Theoretical Astronomy in Leningrad and the Crimean Astrophysical Observatory at Nauchnij.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5850Last Updated: 2006-03-21

Alternate Designations
 1968 BC = 1930 FA = 1958 XC = 1966 QV = 1971 XC 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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