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23947 (1998 UH16)
Classification: Jupiter Trojan          SPK-ID: 2023947
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06650583578017968 5.7111e-08  
a 5.255909242993456 8.3643e-08 au
q 4.906360606003405 2.9572e-07 au
i 3.604073667488547 5.4122e-06 deg
node 216.1751338450969 8.3854e-05 deg
peri 332.8087374351286 9.0852e-05 deg
M 163.2856535587985 3.801e-05 deg
tp 2457004.246268062112
(2014-Dec-12.74626806)
0.0004397 TDB
period 4401.19096708552
12.05
0.00010506
2.876e-07
d
yr
n .0817960417287671 1.9526e-09 deg/d
Q 5.605457879983508 8.9206e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1084  
   data-arc span      10807 days (29.59 yr)  
   first obs. used      1991-04-14  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54924  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:24:19  

Additional Information
 Earth MOID = 3.90739 au 
 Jupiter MOID = .248829 au 
 T_jup = 2.992 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO290642  
diameter diameter 18.951 km 1.487 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
rotation period rot_per 5.72 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Ryan, E.L.; Sharkey, B.N.L.; Woodward, C.E. (2017) Astron. J. 153, A116.]
geometric albedo albedo 0.078   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

23947 (1998 UH16)          Discovered 1998-Oct-23 by ODAS at Caussols
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UH16 = 1991 HX2 = 2001 AQ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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