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85128 (1979 HA)
Classification: Main-belt Asteroid          SPK-ID: 2085128
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1847053092600609 1.065e-08  
a 2.42605567737324 1.1115e-08 au
q 1.977950313201889 3.1283e-08 au
i 24.77543323414974 5.0961e-07 deg
node 48.93077254558327 9.7898e-07 deg
peri 156.6231111574065 4.9062e-06 deg
M 65.3852455271622 7.5481e-06 deg
tp 2459145.815876157586
(2020-Oct-23.31587616)
2.8034e-05 TDB
period 1380.223991753295
3.78
9.4854e-06
2.597e-08
d
yr
n .2608272296025611 1.7925e-09 deg/d
Q 2.87416104154459 1.3168e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1679  
   data-arc span      15442 days (42.28 yr)  
   first obs. used      1979-04-21  
   last obs. used      2021-07-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43792  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:09:37  

Additional Information
 Earth MOID = .984762 au 
 Jupiter MOID = 2.12706 au 
 T_jup = 3.363 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.69   n/a E2021B10  
diameter diameter 5.299 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 1.65369 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.275   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85128 (1979 HA)          Discovered 1979-Apr-21 by Zelinsky, D. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1979 HA = 2000 XW42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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