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12946 (1290 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2012946
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06626320814116381 3.5378e-08  
a 2.395608888796814 8.762e-09 au
q 2.236868158373649 8.4718e-08 au
i 6.195609606536525 4.5549e-06 deg
node 194.8792567012602 3.351e-05 deg
peri 284.0156159829669 4.9254e-05 deg
M 158.5344374979924 3.4938e-05 deg
tp 2458404.092060967563
(2018-Oct-12.59206097)
0.00013146 TDB
period 1354.323145432652
3.71
7.4302e-06
2.034e-08
d
yr
n .2658154379285856 1.4583e-09 deg/d
Q 2.554349619219979 9.3426e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1417  
   data-arc span      17580 days (48.13 yr)  
   first obs. used      1971-03-24  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51523  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:06:49  

Additional Information
 Earth MOID = 1.26217 au 
 Jupiter MOID = 2.49383 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456737.5 (2014-Mar-21.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0668579374813888 3.547e-08  
q 2.23377859086456 8.5064e-08 au
tp 2457051.804902061421
(2015-Jan-29.30490206)
0.00012986 TDB
node 194.9675747013045 3.3525e-05 deg
peri 284.1256503441015 4.8911e-05 deg
i 6.195212727764083 4.5547e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1417  
   data-arc span      17580 days (48.13 yr)  
   first obs. used      1971-03-24  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51523  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:06:49  

Additional Information
 Jupiter MOID = 2.49383 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.258105437134558E-15 -3.003141579998582E-15 1.564637163604313E-12 -3.478684739796317E-16 4.413680281472746E-13 -2.159225149949485E-15
q -3.003141579998582E-15 7.235913831051365E-15 -3.841868239853586E-12 7.759578182542256E-16 -1.087970416556462E-12 5.214507306905151E-15
tp 1.564637163604313E-12 -3.841868239853586E-12 1.686331934271756E-8 7.35688114203782E-12 4.634371307390249E-9 -6.35863991857529E-12
node -3.478684739796317E-16 7.759578182542256E-16 7.35688114203782E-12 1.12393075194419E-9 -1.114910515765448E-9 -3.036948795999539E-11
peri 4.413680281472746E-13 -1.087970416556462E-12 4.634371307390249E-9 -1.114910515765448E-9 2.392268044027583E-9 2.843640690090383E-11
i -2.159225149949485E-15 5.214507306905151E-15 -6.35863991857529E-12 -3.036948795999539E-11 2.843640690090383E-11 2.074504588952506E-11

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 14.9   n/a MPO473942  
rotation period rot_per 1.33 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

12946 (1290 T-1)          Discovered 1971-Mar-25 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1290 T-1 = 1997 GE13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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