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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .57158170048781 6.3179e-09  
a 2.423772197211587 2.1641e-08 au
q 1.038388363134312 1.2898e-08 au
i 12.85875990587069 2.0619e-06 deg
node 250.1301879103125 2.2428e-06 deg
peri 345.7035166073711 6.3199e-06 deg
M 310.8126758839686 9.166e-06 deg
tp 2459188.815827078059
(2020-Dec-05.31582708)
3.7591e-05 TDB
period 1378.275784797276
3.77
1.8459e-05
5.054e-08
d
yr
n .2611959115663856 3.4982e-09 deg/d
Q 3.809156031288861 3.4011e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .26106  
   source      ORB  
   producer      Giorgini  
   solution date      2020-Jan-28 15:47:21  

Additional Information
 Earth MOID = .0343518 au 
 Jupiter MOID = 1.24691 au 
 T_jup = 3.239 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456626.5 (2013-Nov-30.0) TDB
Reference: JPL 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5714125818674421 6.3036e-09  
q 1.038760895122253 1.282e-08 au
tp 2456432.624028114436
(2013-May-20.12402811)
4.9286e-06 TDB
node 250.1579067861725 2.2441e-06 deg
peri 345.6719289667259 6.328e-06 deg
i 12.85356324555311 2.0623e-06 deg
  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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .26106  
   source      ORB  
   producer      Giorgini  
   solution date      2020-Jan-28 15:47:21  

Additional Information
 Jupiter MOID = 1.24691 au 
 T_jup = 3.239 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.973579893585948E-17 -6.437020277377944E-17 -2.265118928084331E-14 -3.571792316147631E-15 -2.41330335340358E-14 -1.00981664323376E-14
q -6.437020277377944E-17 1.64341774374754E-16 5.923988917245244E-14 7.658913864970307E-15 6.436007829513027E-14 2.496406622157575E-14
tp -2.265118928084331E-14 5.923988917245244E-14 2.429137493750651E-11 -6.727008662067012E-13 2.97233179142238E-11 9.329093998264446E-12
node -3.571792316147631E-15 7.658913864970307E-15 -6.727008662067012E-13 5.036062726953368E-12 -5.02027473308702E-12 8.982846143660524E-13
peri -2.41330335340358E-14 6.436007829513027E-14 2.97233179142238E-11 -5.02027473308702E-12 4.004304958342355E-11 1.024604016161595E-11
i -1.00981664323376E-14 2.496406622157575E-14 9.329093998264446E-12 8.982846143660524E-13 1.024604016161595E-11 4.253091568084547E-12

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. 2019-August); 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

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