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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2005027013774429 6.4216e-08  
a 2.268737978901637 1.0517e-08 au
q 1.813849885414259 1.4549e-07 au
i 5.41581866034618 6.0953e-06 deg
node 246.2216851380728 5.9295e-05 deg
peri 115.1755356129433 6.0921e-05 deg
M 144.894838604813 1.2701e-05 deg
tp 2456898.128083663482
(2014-Aug-28.62808366)
4.4305e-05 JED
period 1248.173445117727
3.42
8.6787e-06
2.376e-08
d
yr
n .2884214540920995 2.0054e-09 deg/d
Q 2.723626072389016 1.2625e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1301  
   data-arc span      17993 days (49.26 yr)  
   first obs. used      1966-09-13  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48343  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:09:26  

Additional Information
 Earth MOID = .817576 au 
 Jupiter MOID = 2.75418 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-December); 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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