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185784 (1999 UK54)
Classification: Main-belt Asteroid          SPK-ID: 2185784
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1221672302751759 5.8391e-08  
a 3.092772879215274 3.647e-08 au
q 2.714937382691363 1.9503e-07 au
i 16.57414656625958 9.8492e-06 deg
node 189.4524782403449 2.1529e-05 deg
peri 102.7683406078768 4.8207e-05 deg
M 341.670735515095 4.1199e-05 deg
tp 2459101.649329110907
(2020-Sep-09.14932911)
0.00022769 TDB
period 1986.645918602735
5.44
3.5139e-05
9.621e-08
d
yr
n .1812099461856787 3.2052e-09 deg/d
Q 3.470608375739186 4.0925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      7618 days (20.86 yr)  
   first obs. used      1998-06-22  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55035  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:36:51  

Additional Information
 Earth MOID = 1.76006 au 
 Jupiter MOID = 1.88005 au 
 T_jup = 3.149 
[ 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 15.8   n/a MPO433219  
diameter diameter 3.985 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

185784 (1999 UK54)          Discovered 1999-Oct-19 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1940-Mar-24 17:27 00:04 Jupiter 1.90715782682335 1.90715646093807 1.90715919273031 5.59575941614345 5.51581971270486 2429713.227064298 3.5856383725346 434.158619136619 42.7669544920482 -83.4759730686096 1809394.60657432 T 13 CATAB v2.0e-lin.ifort 2019-Jul-13 13:36:52 2019-Jul-13 13:36
2000-Aug-08 21:23 < 00:01 Jupiter 1.91573349291446 1.91573255038752 1.9157344354415 4.41786123636904 4.31662110796797 2451765.390934819 0.779132986851217 150.953642992566 41.7771503738966 86.5158567782178 1475242.38392863 T 13 CATAB v2.0e-lin.ifort 2019-Jul-13 13:36:52 2019-Jul-13 13:36
2071-Jan-26 14:21 00:03 Jupiter 1.88596679421705 1.88596584142908 1.88596774700835 5.30198739541039 5.21659212577429 2477503.097695141 2.99200214312021 366.59981363052 42.1754509729316 -87.8439416613359 1656574.54170357 T 13 CATAB v2.0e-lin.ifort 2019-Jul-13 13:36:52 2019-Jul-13 13:36
2131-Jul-08 07:07 00:07 Jupiter 1.99957779587859 1.99957536827548 1.9995802234983 3.59517044601346 3.47534878452886 2499579.796805291 7.30480046680573 348.307713930933 73.8073134047085 63.6729400838486 614319.189001112 T 13 CATAB v2.0e-lin.ifort 2019-Jul-13 13:36:52 2019-Jul-13 13:36
2141-Jul-28 22:19 00:06 Jupiter 1.98294980627814 1.98294682307436 1.98295278957637 5.88091328390777 5.80782536750566 2503253.429931476 6.40431107923583 734.023304007263 42.3650778859454 -79.0963493958479 2016759.19893318 T 13 CATAB v2.0e-lin.ifort 2019-Jul-13 13:36:52 2019-Jul-13 13:36
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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