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19716 (1999 UH23)
Classification: Main-belt Asteroid          SPK-ID: 2019716
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .137656923019969 3.4456e-08  
a 2.793657712647934 1.2782e-08 au
q 2.409091387953815 9.7268e-08 au
i 7.554991348419034 4.0702e-06 deg
node 300.9689859040096 2.7383e-05 deg
peri 234.0249695944497 3.0816e-05 deg
M 69.23115347211933 1.3918e-05 deg
tp 2459068.512506007462
(2020-Aug-07.01250601)
6.5608e-05 TDB
period 1705.525502833995
4.67
1.1705e-05
3.205e-08
d
yr
n .2110786378754256 1.4487e-09 deg/d
Q 3.178224037342054 1.4542e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2048  
   data-arc span      9817 days (26.88 yr)  
   first obs. used      1994-08-12  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:52:05  

Additional Information
 Earth MOID = 1.42465 au 
 Jupiter MOID = 1.85699 au 
 T_jup = 3.301 
[ 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 13.58   n/a E2021B10  
diameter diameter 7.775 km 0.237 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.477 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.153   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19716 (1999 UH23)          Discovered 1999-Oct-28 by CSS at Catalina
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 UH23 = 1994 PA32 = 1998 MO29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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