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26308 (1998 SM165)
Classification: TransNeptunian Object          SPK-ID: 2026308
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3738117647964315 1.2112e-05  
a 47.71901981983715 0.001654 au
q 29.88108880662794 0.00050611 au
i 13.48895381194131 4.9032e-05 deg
node 183.0886297131621 0.00013362 deg
peri 130.8257756672886 0.0028327 deg
M 49.70274403371171 0.0035325 deg
tp 2442377.340804916625
(1974-Nov-25.84080492)
0.31804 TDB
period 120402.5537537935
329.64
6.2599
0.01714
d
yr
n .0029899698035986 1.5545e-07 deg/d
Q 65.55695083304636 0.0022723 au
  Orbit Determination Parameters
   # obs. used (total)      210  
   data-arc span      13527 days (37.03 yr)  
   first obs. used      1982-10-12  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .59244  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 00:42:41  

Additional Information
 Earth MOID = 28.8838 au 
 Jupiter MOID = 24.9207 au 
 T_jup = 5.572 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.7   n/a MPO384974  
rotation period rot_per 7.98 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:
[Romanishin, W.; Tegler, S.C.; Rettig, T.W.; Consolmagno, G.; Botthof, B. (2001) Bull. Amer. Astron. Soc. 33, 1031.]

26308 (1998 SM165)          Discovered 1998-Sep-16 by Danzl, N. at Steward
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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