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308283 (2005 HG8)
Classification: Main-belt Asteroid          SPK-ID: 2308283
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3432824228107033 4.3937e-08  
a 2.751693200159525 3.9066e-08 au
q 1.807085291577026 1.3592e-07 au
i 19.6819524314606 7.6367e-06 deg
node 70.23218179011513 1.4274e-05 deg
peri 233.7350629923148 2.0056e-05 deg
M 50.69891936130205 9.9161e-06 deg
tp 2458765.701864147705
(2019-Oct-09.20186415)
4.6264e-05 TDB
period 1667.241234560611
4.56
3.5505e-05
9.721e-08
d
yr
n .2159255616628719 4.5982e-09 deg/d
Q 3.696301108742024 5.2476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      388  
   data-arc span      5230 days (14.32 yr)  
   first obs. used      2005-04-06  
   last obs. used      2019-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47848  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:16:35  

Additional Information
 Earth MOID = .856596 au 
 Jupiter MOID = 1.78916 au 
 T_jup = 3.177 
[ 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 MPO476377  
diameter diameter 4.173 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

308283 (2005 HG8)          Discovered 2005-Apr-30 by LONEOS at Anderson Mesa
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ 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
1907-Apr-22 22:13 00:06 Jupiter 1.81418246531126 1.81417918465277 1.81418574774958 4.19898713602781 4.08628366859698 2417688.425981589 6.15824839669216 2978.7722662409 43.4703505447142 86.7900833308171 1565642.31203449 T 17 CATAB v2.0f-lin.ifort 2020-Feb-25 18:16:47 2020-Feb-25 18:16
1966-Oct-28 01:58 00:03 Jupiter 1.88315064833883 1.88314848024119 1.8831528174215 3.97656506083271 3.86179873709395 2439426.582044633 2.95260920936797 2222.52981409941 11.3012160607264 87.0957401871333 1421503.613089 T 17 CATAB v2.0f-lin.ifort 2020-Feb-25 18:16:47 2020-Feb-25 18:16
2026-May-10 17:03 < 00:01 Jupiter 1.97227437911051 1.97227320534438 1.97227555288561 3.66122165955585 3.54197887416619 2461171.210374397 0.835511568683242 492.436147654432 45.6934565362073 86.6554943148125 1277002.66391604 T 17 CATAB v2.0f-lin.ifort 2020-Feb-25 18:16:47 2020-Feb-25 18:16
2048-Aug-18 07:20 00:02 Jupiter 1.92541948377371 1.92541724040579 1.92542172716822 4.75631700826993 4.6629089437215 2469306.805455803 2.09248654440036 473.079216107279 64.9493709582443 -79.2958376217764 1439268.76404476 T 17 CATAB v2.0f-lin.ifort 2020-Feb-25 18:16:47 2020-Feb-25 18:16
2108-Feb-20 23:31 00:05 Jupiter 1.86512158813918 1.86511786821678 1.86512530810928 4.59435076354789 4.49441687159792 2491041.479658650 5.41555197153006 590.337252871005 90.5791993074026 -74.7984615928865 1028633.04242788 T 17 CATAB v2.0f-lin.ifort 2020-Feb-25 18:16:47 2020-Feb-25 18:16
2167-Aug-20 08:28 00:09 Jupiter 1.82830638036138 1.82830259368963 1.82831016717218 4.42757023855372 4.32166785358019 2512771.852576985 8.59000906468678 890.799083364617 62.1580855344489 -79.3630355701695 1011504.86202225 T 17 CATAB v2.0f-lin.ifort 2020-Feb-25 18:16:47 2020-Feb-25 18:16

Alternate Designations
 2005 HG8 = 2005 GR209 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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