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85609 (1998 HZ8)
Classification: Main-belt Asteroid          SPK-ID: 2085609
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1814797777465104 6.186e-08  
a 2.311038478404305 8.5057e-09 au
q 1.891631728979858 1.4333e-07 au
i 7.495604279922738 5.4089e-06 deg
node 66.78944125128427 3.3153e-05 deg
peri 338.1883518705258 3.4974e-05 deg
M 263.8595990292218 1.1184e-05 deg
tp 2459343.198828570883
(2021-May-08.69882857)
4.077e-05 TDB
period 1283.243850033625
3.51
7.0844e-06
1.94e-08
d
yr
n .2805390417344037 1.5488e-09 deg/d
Q 2.730445227828752 1.0049e-08 au
  Orbit Determination Parameters
   # obs. used (total)      722  
   data-arc span      8213 days (22.49 yr)  
   first obs. used      1996-12-03  
   last obs. used      2019-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:35:15  

Additional Information
 Earth MOID = .903674 au 
 Jupiter MOID = 2.65808 au 
 T_jup = 3.551 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457088.5 (2015-Mar-07.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .182251027380183 6.1826e-08  
q 1.88933530329485 1.4337e-07 au
tp 2456779.386085579479
(2014-May-01.88608558)
3.5704e-05 TDB
node 66.83291195828195 3.313e-05 deg
peri 338.4131870682705 3.493e-05 deg
i 7.499476875500302 5.4123e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      722  
   data-arc span      8213 days (22.49 yr)  
   first obs. used      1996-12-03  
   last obs. used      2019-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:35:15  

Additional Information
 Jupiter MOID = 2.65808 au 
 T_jup = 3.551 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.822426652192912E-15 -8.853856600549822E-15 -4.938794726304055E-13 -3.07957156826077E-14 -2.374194784166046E-13 3.228023463803768E-16
q -8.853856600549822E-15 2.055551777100117E-14 1.178197196543414E-12 7.177032975566067E-14 5.606992447583223E-13 -9.147214358612278E-16
tp -4.938794726304055E-13 1.178197196543414E-12 1.274793906215003E-9 -6.553480474436259E-13 4.088054821608898E-10 -1.855478327401686E-12
node -3.07957156826077E-14 7.177032975566067E-14 -6.553480474436259E-13 1.097567631421131E-9 -1.086611940224001E-9 -6.863180756033269E-11
peri -2.374194784166046E-13 5.606992447583223E-13 4.088054821608898E-10 -1.086611940224001E-9 1.220080444437822E-9 6.751555101353173E-11
i 3.228023463803768E-16 -9.147214358612278E-16 -1.855478327401686E-12 -6.863180756033269E-11 6.751555101353173E-11 2.9293353900107E-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 16.2   n/a MPO385350  
diameter diameter 1.573 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.236   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

85609 (1998 HZ8)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 HZ8 = 2003 UR278 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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