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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 103 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5951286659103866 2.2883e-08  
a 2.30826976761161 2.8719e-09 au
q .9345522602516342 5.2889e-08 au
i 24.48173622115635 7.7275e-06 deg
node 18.21452468215092 3.0201e-06 deg
peri 48.10027343138511 9.6588e-06 deg
M 298.8016530945173 1.6536e-06 deg
tp 2458818.253659527895
(2019-Nov-30.75365953)
6.1449e-06 TDB
period 1280.9384794513
3.51
2.3906e-06
6.545e-09
d
yr
n .2810439422150928 5.2451e-10 deg/d
Q 3.681987274971585 4.5811e-09 au
  Orbit Determination Parameters
   # obs. used (total)      544  
   # delay obs. used      5  
   # Doppler obs. used      2  
   data-arc span      7710 days (21.11 yr)  
   first obs. used      1998-09-29  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35905  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-09 05:22:25  

Additional Information
 Earth MOID = .0555714 au 
 Jupiter MOID = 2.15938 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-January); 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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