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136993 (1998 ST49)
Classification: Apollo [NEO]          SPK-ID: 2136993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 139 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5952477397868717 1.5153e-08  
a 2.308493344730363 2.4116e-09 au
q .9343678989665786 3.4717e-08 au
i 24.48193391458129 6.0185e-06 deg
node 18.20475457436982 2.4011e-06 deg
peri 48.10681243004606 5.7543e-06 deg
M 51.21621741641049 1.6001e-06 deg
tp 2458818.237901289885
(2019-Nov-30.73790129)
5.4447e-06 TDB
period 1281.124589935406
3.51
2.0075e-06
5.496e-09
d
yr
n .2810031146292737 4.4034e-10 deg/d
Q 3.682618790494147 3.8471e-09 au
  Orbit Determination Parameters
   # obs. used (total)      732  
   # delay obs. used      5  
   # Doppler obs. used      2  
   data-arc span      7882 days (21.58 yr)  
   first obs. used      1998-09-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-08 06:59:55  

Additional Information
 Earth MOID = .056035 au 
 Jupiter MOID = 2.16054 au 
 T_jup = 3.228 
[ show covariance matrix ]

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 17.7   n/a MPO260080  
rotation period rot_per 2.3017 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Galad, A. (2007) Earth, Moon, and Planets 100, 77-82.]
[Hicks, M.; Brewer, M.; Somers, J. (2012) Astronomer's Telegram 4588. http://www.astronomerstelegram.org]
[Observers at Arecibo and Goldstone. (2012) http://www.naic.edu/~pradar/ http://www.jpl.nasa.gov/asteroidwatch]
SMASSII spectral type spec_B Q   n/a Binzel et al. (2001) Icarus 151, 139-149  

136993 (1998 ST49)          Discovered 1998-Sep-29 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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