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23708 (1997 TR18)
Classification: Main-belt Asteroid          SPK-ID: 2023708
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04857520770500014 6.2641e-08  
a 2.988233312985028 2.9169e-08 AU
q 2.84307925913578 1.9311e-07 AU
i 9.460547382235559 5.8544e-06 deg
node 200.1758180459788 3.9641e-05 deg
peri 291.1117434863714 7.4139e-05 deg
M 350.5337608658481 6.1229e-05 deg
tp 2457050.112961517515
(2015-Jan-27.61296152)
0.00032081 JED
period 1886.775296206954
5.17
2.7626e-05
7.564e-08
d
yr
n .190801734962144 2.7937e-09 deg/d
Q 3.133387366834277 3.0586e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1105  
   data-arc span      12373 days (33.88 yr)  
   first obs. used      1981-07-26  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46949  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:33:38  

Additional Information
 Earth MOID = 1.87337 AU 
 T_jup = 3.235 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0 mag n/a MPO296324  
rotation period rot_per 3.9775 h n/a LCDB (Rev. 2015-July); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

23708 (1997 TR18)          Discovered 1997-Oct-05 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 TR18 = 1998 XU84 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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