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285263 (1998 QE2)
Classification: Amor [NEO, PHA]          SPK-ID: 2285263
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 153 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5715374679634138 6.3012e-09  
a 2.423479451748985 2.1466e-08 au
q 1.038370142235008 1.29e-08 au
i 12.85845919737062 2.0639e-06 deg
node 250.1269445288905 2.2463e-06 deg
peri 345.7133393528073 6.3235e-06 deg
M 3.049810007322091 9.8615e-06 deg
tp 2459188.825784016366
(2020-Dec-05.32578402)
3.7595e-05 TDB
period 1378.026088188532
3.77
1.8309e-05
5.013e-08
d
yr
n .2612432399398432 3.4709e-09 deg/d
Q 3.808588761262962 3.3734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1851  
   # delay obs. used      4  
   # Doppler obs. used      0  
   data-arc span      7831 days (21.44 yr)  
   first obs. used      1998-08-19  
   last obs. used      2020-01-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .26093  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 04:33:18  

Additional Information
 Earth MOID = .0328866 au 
 Jupiter MOID = 1.24639 au 
 T_jup = 3.239 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.2   n/a MPO427557  
rotation period rot_per 4.749 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2013) http://www.asu.cas.cz/~ppravec/neo.htm]
[Hill, K. (2014) Minor Planet Bull. 41, 2-3.]

285263 (1998 QE2)          Discovered 1998-Aug-19 by LINEAR at Socorro
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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