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181826 (1998 SP49)
Classification: Mars-crossing Asteroid          SPK-ID: 2181826
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3372203528916031 5.7317e-08  
a 2.317539053264733 6.1699e-09 au
q 1.536017715882728 1.3606e-07 au
i 4.980545706665005 3.8651e-06 deg
node 188.5273206679581 3.6735e-05 deg
peri 123.7757585130964 3.8368e-05 deg
M 140.0604939128417 5.495e-06 deg
tp 2458699.137125694590
(2019-Aug-03.63712569)
2.0635e-05 TDB
period 1288.661989599045
3.53
5.1462e-06
1.409e-08
d
yr
n .2793595239912451 1.1156e-09 deg/d
Q 3.099060390646738 8.2505e-09 au
  Orbit Determination Parameters
   # obs. used (total)      709  
   data-arc span      8162 days (22.35 yr)  
   first obs. used      1998-09-14  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48546  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:11  

Additional Information
 Earth MOID = .527756 au 
 Jupiter MOID = 2.23096 au 
 T_jup = 3.497 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.90   n/a MPCxxxxx  
rotation period rot_per 2.984 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

181826 (1998 SP49)          Discovered 1998-Sep-22 by Bickel, W. at Bergisch Gladbach
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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