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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2006566864837053 6.6336e-08  
a 2.267465774588383 1.224e-08 AU
q 1.81248360554427 1.5144e-07 AU
i 5.417760892945664 6.4874e-06 deg
node 246.2745551597209 7.2229e-05 deg
peri 114.9401895712292 7.3802e-05 deg
M 29.66490366100628 1.6333e-05 deg
tp 2456897.733875425885
(2014-Aug-28.23387543)
5.6396e-05 JED
period 1247.123714590427
3.41
1.0099e-05
2.765e-08
d
yr
n .2886642245578893 2.3374e-09 deg/d
Q 2.722447943632496 1.4697e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      968  
   data-arc span      17550 days (48.05 yr)  
   first obs. used      1966-09-13  
   last obs. used      2014-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50738  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:14:27  

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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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