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9120 (1998 DR8)
Classification: Main-belt Asteroid          SPK-ID: 2009120
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2006566963095008 6.5247e-08  
a 2.267465772250319 1.0751e-08 AU
q 1.812483581395699 1.4812e-07 AU
i 5.417763507184184 6.2618e-06 deg
node 246.2746069615128 6.2717e-05 deg
peri 114.9401363987497 6.4328e-05 deg
M 29.66490666987525 1.3138e-05 deg
tp 2456897.733865161412
(2014-Aug-28.23386516)
4.5572e-05 JED
period 1247.123712661497
3.41
8.8699e-06
2.428e-08
d
yr
n .2886642250043671 2.0531e-09 deg/d
Q 2.722447963104939 1.2909e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      17659 days (48.35 yr)  
   first obs. used      1966-09-13  
   last obs. used      2015-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48548  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:25:23  

Additional Information
 Earth MOID = .81814 AU 
 T_jup = 3.582 
[ 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 13.6 mag n/a MPO266007  
rotation period rot_per 14.750 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm]
[Shipley, H.; Dillard, A.; Kendall, J.; Reichert, M.; et al. (2008) Minor Planet Bul. 35, 99-101.]

9120 (1998 DR8)          Discovered 1998-Feb-22 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 19980808/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 DR8 = 1966 PE = 1966 RC = 1973 UW2 = 1990 SQ15 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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