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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .37380356236734 7.6436e-06  
a 47.71819794706975 0.0010582 au
q 29.88096556470518 0.00032932 au
i 13.48896437936018 3.2443e-05 deg
node 183.0886783484493 9.9863e-05 deg
peri 130.8247659837037 0.0018267 deg
M 49.7044332802606 0.0022639 deg
tp 2442377.205301789636
(1974-Nov-25.70530179)
0.20453 TDB
period 120399.4431967972
329.64
4.0048
0.01096
d
yr
n .002990047050396796 9.9456e-08 deg/d
Q 65.5554303294343 0.0014537 au
  Orbit Determination Parameters
   # obs. used (total)      347  
   data-arc span      13888 days (38.02 yr)  
   first obs. used      1982-10-12  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .59202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:29:42  

Additional Information
 Earth MOID = 28.8837 au 
 Jupiter MOID = 24.9206 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. 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:
[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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