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12400 Katumaru (1995 OA1)
Classification: Main-belt Asteroid          SPK-ID: 2012400
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699110707583429 3.0887e-08  
a 2.342317734752232 6.1032e-09 au
q 1.944332020384224 7.3711e-08 au
i 5.838948485895827 3.3346e-06 deg
node 224.7486153114361 3.2268e-05 deg
peri 105.8111766574681 3.361e-05 deg
M 330.2693632078257 9.2943e-06 deg
tp 2459108.635638125413
(2020-Sep-16.13563813)
3.3861e-05 TDB
period 1309.384322887954
3.58
5.1176e-06
1.401e-08
d
yr
n .2749383765386702 1.0746e-09 deg/d
Q 2.74030344912024 7.1402e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2034  
   data-arc span      10668 days (29.21 yr)  
   first obs. used      1991-05-18  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52692  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:33:18  

Additional Information
 Earth MOID = .943721 au 
 Jupiter MOID = 2.631 au 
 T_jup = 3.537 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO337363  
rotation period rot_per 2.610 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

12400 Katumaru           Discovered 1995 July 28 by T. Okuni at Nanyo.
Katumaru Okuni (b. 1932) is the younger brother of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1995 OA1 = 1991 KR2 = 1998 KL15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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