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496816 (1989 UP)
Classification: Apollo [NEO, PHA]          SPK-ID: 2496816
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4720010518507181 1.605e-08  
a 1.861084749399099 1.5952e-09 au
q .9826507900993943 3.0303e-08 au
i 3.855176766369165 3.0933e-06 deg
node 53.17385078115068 2.9071e-05 deg
peri 17.83869432580409 2.9017e-05 deg
M 355.492251659054 2.8843e-06 deg
tp 2459012.111940820248
(2020-Jun-11.61194082)
7.4344e-06 TDB
period 927.3584901174548
2.54
1.1923e-06
3.264e-09
d
yr
n .3881993898113815 4.991e-10 deg/d
Q 2.739518708698804 2.3481e-09 au
  Orbit Determination Parameters
   # obs. used (total)      344  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10387 days (28.44 yr)  
   first obs. used      1989-10-27  
   last obs. used      2018-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41423  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Apr-06 06:25:12  

Additional Information
 Earth MOID = .00625464 au 
 Jupiter MOID = 2.58151 au 
 T_jup = 3.848 
[ 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 20.5   n/a MPO437864  
diameter diameter 0.3 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 6.98 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]

496816 (1989 UP)          Discovered 1989-Oct-27 by Rabinowitz, D. L., Scotti, J. V. at Steward
Reference: Last Updated: 2017-10-09

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