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18444 (1994 PL10)
Classification: Main-belt Asteroid          SPK-ID: 2018444
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1920661993735693 3.8112e-08  
a 3.129301455175769 2.1156e-08 au
q 2.528268417985979 1.2053e-07 au
i 2.825063107966543 4.3748e-06 deg
node 322.8125846651233 8.4359e-05 deg
peri 8.415016869251989 8.5115e-05 deg
M 228.9747084268398 1.4407e-05 deg
tp 2459736.405695332115
(2022-Jun-05.90569533)
8.599e-05 TDB
period 2021.945894099655
5.54
2.0504e-05
5.614e-08
d
yr
n .1780463072976061 1.8055e-09 deg/d
Q 3.730334492365559 2.5219e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1205  
   data-arc span      10274 days (28.13 yr)  
   first obs. used      1992-03-01  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52043  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:49:19  

Additional Information
 Earth MOID = 1.51765 au 
 Jupiter MOID = 1.63792 au 
 T_jup = 3.183 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456676.5 (2014-Jan-19.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1897708227437567 3.8066e-08  
q 2.537822235597086 1.2025e-07 au
tp 2455690.481191325222
(2011-May-08.98119133)
6.5453e-05 TDB
node 322.8426333294445 8.4379e-05 deg
peri 8.574250047536259 8.5155e-05 deg
i 2.823476040713714 4.3719e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1205  
   data-arc span      10274 days (28.13 yr)  
   first obs. used      1992-03-01  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52043  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:49:19  

Additional Information
 Jupiter MOID = 1.63792 au 
 T_jup = 3.183 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.449048683027803E-15 -4.531601413174492E-15 3.327414301460104E-13 -2.33856408301314E-15 5.398151978999173E-14 -2.512527661851355E-16
q -4.531601413174492E-15 1.445993939186922E-14 -7.248535436821195E-13 1.273614301921633E-14 -9.737656776206449E-14 1.255241973372446E-15
tp 3.327414301460104E-13 -7.248535436821195E-13 4.284083137701878E-9 -1.668789873271467E-11 7.783489645876458E-10 -9.057568445231912E-13
node -2.33856408301314E-15 1.273614301921633E-14 -1.668789873271467E-11 7.119818166194475E-9 -7.112371370789849E-9 5.359014761448666E-11
peri 5.398151978999173E-14 -9.737656776206449E-14 7.783489645876458E-10 -7.112371370789849E-9 7.251458347972546E-9 -5.359361872246983E-11
i -2.512527661851355E-16 1.255241973372446E-15 -9.057568445231912E-13 5.359014761448666E-11 -5.359361872246983E-11 1.911315707092868E-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 14.1   n/a MPO467909  
diameter diameter 8.902 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.176 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.061   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18444 (1994 PL10)          Discovered 1994-Aug-10 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 PL10 = 2000 SS272 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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