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16816 (1997 UF9)
Classification: Apollo [NEO]          SPK-ID: 2016816
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 177 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6038386813722173 8.523e-08  
a 1.442513588878259 4.7285e-09 au
q .5714680855085065 1.2293e-07 au
i 25.9054309725324 9.6309e-06 deg
node 37.17692578178812 8.6736e-06 deg
peri 157.9378521740503 1.0595e-05 deg
M 19.09687937511152 1.4917e-05 deg
tp 2459166.931015732819
(2020-Nov-13.43101573)
2.6175e-05 TDB
period 632.8172314862582
1.73
3.1115e-06
8.519e-09
d
yr
n .56888463538594 2.7972e-09 deg/d
Q 2.313559092248012 7.5837e-09 au
  Orbit Determination Parameters
   # obs. used (total)      898  
   data-arc span      8375 days (22.93 yr)  
   first obs. used      1997-10-29  
   last obs. used      2020-10-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52251  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:42:47  

Additional Information
 Earth MOID = .379366 au 
 Jupiter MOID = 2.6778 au 
 T_jup = 4.362 
[ 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 16.2   n/a MPO502298  
rotation period rot_per 2.449 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; Mommert, M.; Trilling, D.E.; Sicafoose, A.A.; et al. (2017) Astron. J. 154, A162.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 144-152.]

16816 (1997 UF9)          Discovered 1997-Oct-29 by LINEAR at Socorro
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

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