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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2006566801746517 6.4443e-08  
a 2.267465773974811 1.0662e-08 AU
q 1.812483619359379 1.4614e-07 AU
i 5.417761910845592 6.2137e-06 deg
node 246.2746359672867 6.0662e-05 deg
peri 114.9401068242903 6.2319e-05 deg
M 29.66490634288125 1.3066e-05 deg
tp 2456897.733866176959
(2014-Aug-28.23386618)
4.533e-05 JED
period 1247.123714084223
3.41
8.7959e-06
2.408e-08
d
yr
n .2886642246750572 2.0359e-09 deg/d
Q 2.722447928590244 1.2801e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1261  
   data-arc span      17728 days (48.54 yr)  
   first obs. used      1966-09-13  
   last obs. used      2015-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47497  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:34:10  

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 13.7 mag n/a MPO332906  
rotation period rot_per 14.750 h n/a LCDB (Rev. 2015-July); 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
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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