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JPL Small-Body Database Browser
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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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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 165 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6039741460389335 8.7012e-08  
a 1.442476196369048 4.8273e-09 au
q .5712578674855633 1.2557e-07 au
i 25.90927707682182 9.75e-06 deg
node 37.17819610651279 8.7369e-06 deg
peri 157.9476657597449 1.0812e-05 deg
M 37.72547463216478 1.5397e-05 deg
tp 2458534.187771775877
(2019-Feb-19.68777178)
2.6994e-05 TDB
period 632.792626029164
1.73
3.1765e-06
8.697e-09
d
yr
n .5689067558499147 2.8558e-09 deg/d
Q 2.313694525252532 7.7429e-09 au
  Orbit Determination Parameters
   # obs. used (total)      835  
   data-arc span      8039 days (22.01 yr)  
   first obs. used      1997-10-29  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53257  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-03 05:19:03  

Additional Information
 Earth MOID = .379399 au 
 Jupiter MOID = 2.67982 au 
 T_jup = 4.362 
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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 16.1   n/a MPO452409  
rotation period rot_per 2.449 h n/a LCDB (Rev. 2019-January); 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. 46-2, submitted. (NEA Gaggle) http://www.planetarysciences.org/PHP/CS3_Lightcurves.php]

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

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