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JPL Small-Body Database Browser
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59473 (1999 HT1)
Classification: Main-belt Asteroid          SPK-ID: 2059473
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1443992017760383 3.9608e-08  
a 2.652882050456782 1.4201e-08 au
q 2.269807999964843 1.0882e-07 au
i 5.563239297969914 3.9929e-06 deg
node 95.32363465927031 4.4403e-05 deg
peri 267.664107418877 4.6401e-05 deg
M 185.4670561977136 1.4686e-05 deg
tp 2459765.656464726187
(2022-Jul-05.15646473)
6.6971e-05 TDB
period 1578.248331234637
4.32
1.2673e-05
3.47e-08
d
yr
n .2281009856784566 1.8316e-09 deg/d
Q 3.035956100948721 1.6252e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1211  
   data-arc span      8477 days (23.21 yr)  
   first obs. used      1996-11-14  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52055  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:48:14  

Additional Information
 Earth MOID = 1.27563 au 
 Jupiter MOID = 2.43494 au 
 T_jup = 3.368 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456629.5 (2013-Dec-03.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1419501252125317 3.9394e-08  
q 2.277046356722114 1.0803e-07 au
tp 2456603.647338058144
(2013-Nov-07.14733806)
6.1314e-05 TDB
node 95.46493393922945 4.4292e-05 deg
peri 266.7952582576623 4.6406e-05 deg
i 5.568475279354543 3.9979e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1211  
   data-arc span      8477 days (23.21 yr)  
   first obs. used      1996-11-14  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52055  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:48:14  

Additional Information
 Jupiter MOID = 2.43494 au 
 T_jup = 3.368 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.551906661668229E-15 -4.230396934098708E-15 -4.976563487933461E-13 1.379766018064778E-14 -1.242565850095783E-13 -7.305507948255315E-16
q -4.230396934098708E-15 1.166989513021353E-14 1.397204560078956E-12 -3.908233221268413E-14 3.481105727869511E-13 2.204306417497214E-15
tp -4.976563487933461E-13 1.397204560078956E-12 3.759399779572558E-9 -9.649778764072935E-12 8.722839533660565E-10 2.01719491679672E-12
node 1.379766018064778E-14 -3.908233221268413E-14 -9.649778764072935E-12 1.961794228696616E-9 -1.954334954719709E-9 2.704090461933717E-11
peri -1.242565850095783E-13 3.481105727869511E-13 8.722839533660565E-10 -1.954334954719709E-9 2.153557438204311E-9 -2.645937960328815E-11
i -7.305507948255315E-16 2.204306417497214E-15 2.01719491679672E-12 2.704090461933717E-11 -2.645937960328815E-11 1.59828283258161E-11

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 14.3   n/a MPO337725  
diameter diameter 5.423 km 0.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.43277 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.095   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59473 (1999 HT1)          Discovered 1999-Apr-19 by LINEAR at Visnjan
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 HT1 = 2000 RU105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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