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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 ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1337342572155548 2.9038e-08  
a 2.636070516722663 1.0392e-08 au
q 2.283537584200934 7.6119e-08 au
i 11.85093791262062 6.1512e-07 deg
node 85.18109661647351 3.9866e-06 deg
peri 316.688535282038 6.9214e-06 deg
M 236.5617817309595 7.9059e-06 deg
tp 2459932.520137913640
(2022-Dec-19.02013791)
3.6476e-05 TDB
period 1563.26988800444
4.28
9.2446e-06
2.531e-08
d
yr
n .2302865313036578 1.3618e-09 deg/d
Q 2.988603449244392 1.1782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2580  
   data-arc span      22844 days (62.54 yr)  
   first obs. used      1958-12-04  
   last obs. used      2021-06-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38977  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:30:08  

Additional Information
 Earth MOID = 1.30835 au 
 Jupiter MOID = 2.40001 au 
 T_jup = 3.355 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457123.5 (2015-Apr-11.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1318884748078854 2.8973e-08  
q 2.290415692776305 7.577e-08 au
tp 2456806.914079003486
(2014-May-29.41407900)
2.6832e-05 TDB
node 85.28796972527739 3.9841e-06 deg
peri 317.1143872283912 6.9404e-06 deg
i 11.85081169201185 6.1565e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2580  
   data-arc span      22844 days (62.54 yr)  
   first obs. used      1958-12-04  
   last obs. used      2021-06-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38977  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:30:08  

Additional Information
 Jupiter MOID = 2.40001 au 
 T_jup = 3.355 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.394621490856531E-16 -2.179508325695624E-15 5.531165125317009E-13 -1.019298958763981E-14 7.437777282274636E-14 3.660033092419089E-15
q -2.179508325695624E-15 5.741022201453557E-15 -1.392698289399499E-12 2.619389460299221E-14 -1.785041934325239E-13 -9.493281850135203E-15
tp 5.531165125317009E-13 -1.392698289399499E-12 7.199402076943717E-10 -1.797816873535654E-11 1.457732323079816E-10 6.656097463671337E-13
node -1.019298958763981E-14 2.619389460299221E-14 -1.797816873535654E-11 1.587302697545411E-11 -1.889656049800455E-11 1.627067986474915E-12
peri 7.437777282274636E-14 -1.785041934325239E-13 1.457732323079816E-10 -1.889656049800455E-11 4.816961949769567E-11 -1.617385977015842E-12
i 3.660033092419089E-15 -9.493281850135203E-15 6.656097463671337E-13 1.627067986474915E-12 -1.617385977015842E-12 3.790206044932338E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.82   n/a MPCxxxxx  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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