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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699110704603549 3.0725e-08  
a 2.342317732462618 5.6199e-09 au
q 1.944332019181623 7.346e-08 au
i 5.83895182042626 2.701e-06 deg
node 224.748623391478 3.1764e-05 deg
peri 105.8111652178303 3.2944e-05 deg
M 330.2693680380266 7.7615e-06 deg
tp 2459108.635620398556
(2020-Sep-16.13562040)
2.8188e-05 TDB
period 1309.384320968071
3.58
4.7124e-06
1.29e-08
d
yr
n .2749383769417983 9.8949e-10 deg/d
Q 2.740303445743613 6.5748e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2317  
   data-arc span      10766 days (29.48 yr)  
   first obs. used      1991-05-18  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5017  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:49:08  

Additional Information
 Earth MOID = .943721 au 
 Jupiter MOID = 2.631 au 
 T_jup = 3.537 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457247.5 (2015-Aug-13.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1691515296680867 3.0677e-08  
q 1.946356609861265 7.3209e-08 au
tp 2457800.570591200185
(2017-Feb-16.07059120)
2.9348e-05 TDB
node 224.786230597097 3.1768e-05 deg
peri 105.920416267129 3.2961e-05 deg
i 5.837608443182 2.7008e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2317  
   data-arc span      10766 days (29.48 yr)  
   first obs. used      1991-05-18  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5017  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:49:08  

Additional Information
 Jupiter MOID = 2.631 au 
 T_jup = 3.537 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.410926716081919E-16 -2.241601924471358E-15 2.484244038779946E-15 1.623917632404121E-15 1.495192324382369E-15 -2.755726085803765E-15
q -2.241601924471358E-15 5.359573221978307E-15 -4.502912858462003E-14 -3.733361547847943E-15 -1.752681580478943E-14 6.588486099508633E-15
tp 2.484244038779946E-15 -4.502912858462003E-14 8.613244004682555E-10 3.382082898990004E-12 2.677548325025503E-10 3.119544954118149E-13
node 1.623917632404121E-15 -3.733361547847943E-15 3.382082898990004E-12 1.009206581149224E-9 -1.002801772921666E-9 -8.592329655905873E-12
peri 1.495192324382369E-15 -1.752681580478943E-14 2.677548325025503E-10 -1.002801772921666E-9 1.086444257915331E-9 8.636910253173338E-12
i -2.755726085803765E-15 6.588486099508633E-15 3.119544954118149E-13 -8.592329655905873E-12 8.636910253173338E-12 7.294472484579127E-12

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. 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:
[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

[ show close-approach data ]
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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