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85612 (1998 HL23)
Classification: Main-belt Asteroid          SPK-ID: 2085612
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333035562579964 6.6776e-08  
a 2.609502263682808 1.7802e-08 au
q 2.261646331870597 1.7738e-07 au
i 11.55998844504625 8.6745e-06 deg
node 187.4929860839747 2.2239e-05 deg
peri 52.80782875659903 3.5176e-05 deg
M 322.6673881303669 2.523e-05 deg
tp 2458760.169078247935
(2019-Oct-03.66907825)
0.00010825 TDB
period 1539.695866176789
4.22
1.5756e-05
4.314e-08
d
yr
n .2338124092610018 2.3926e-09 deg/d
Q 2.957358195495017 2.0175e-08 au
  Orbit Determination Parameters
   # obs. used (total)      424  
   data-arc span      7710 days (21.11 yr)  
   first obs. used      1998-03-22  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62535  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:59:20  

Additional Information
 Earth MOID = 1.27161 au 
 Jupiter MOID = 2.07491 au 
 T_jup = 3.369 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457111.5 (2015-Mar-30.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326270212398714 6.6971e-08  
q 2.263628717484233 1.7784e-07 au
tp 2457218.715176759616
(2015-Jul-15.21517676)
0.00010627 TDB
node 187.506323716712 2.2237e-05 deg
peri 52.5059314659392 3.5221e-05 deg
i 11.55962399345113 8.6744e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      424  
   data-arc span      7710 days (21.11 yr)  
   first obs. used      1998-03-22  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62535  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:59:20  

Additional Information
 Jupiter MOID = 2.07491 au 
 T_jup = 3.369 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.485099777362047E-15 -1.186597419821586E-14 -4.35177007223978E-12 3.205059057835241E-14 -1.059571396440984E-12 -1.026272673592541E-14
q -1.186597419821586E-14 3.162675522537628E-14 1.147669651696884E-11 -8.409259239239301E-14 2.787442864270074E-12 2.80971862180693E-14
tp -4.35177007223978E-12 1.147669651696884E-11 1.129326162862785E-8 -3.881940644471178E-11 2.915218803282482E-9 1.559072351545943E-11
node 3.205059057835241E-14 -8.409259239239301E-14 -3.881940644471178E-11 4.94493330340828E-10 -4.930048126828436E-10 7.706069642113705E-11
peri -1.059571396440984E-12 2.787442864270074E-12 2.915218803282482E-9 -4.930048126828436E-10 1.240547240825322E-9 -7.160979987031664E-11
i -1.026272673592541E-14 2.80971862180693E-14 1.559072351545943E-11 7.706069642113705E-11 -7.160979987031664E-11 7.52450066531041E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO432399  
diameter diameter 4.012 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.063   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85612 (1998 HL23)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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