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4225 Hobart (1989 BN)
Classification: Main-belt Asteroid          SPK-ID: 2004225
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1078612622532219 1.7291e-08  
a 2.241945096071083 6.433e-09 au
q 2.000126068106435 4.0825e-08 au
i 3.482125459990471 7.1456e-07 deg
node 61.96964453938472 1.6159e-05 deg
peri 258.6243602671925 1.8261e-05 deg
M 354.1408533492855 8.3676e-06 deg
tp 2459220.455736166072
(2021-Jan-05.95573617)
2.8521e-05 TDB
period 1226.128214235738
3.36
5.2774e-06
1.445e-08
d
yr
n .2936071414231282 1.2637e-09 deg/d
Q 2.483764124035731 7.1269e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3012  
   data-arc span      24052 days (65.85 yr)  
   first obs. used      1954-11-23  
   last obs. used      2020-09-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41562  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:05:33  

Additional Information
 Earth MOID = .98878 au 
 Jupiter MOID = 2.75513 au 
 T_jup = 3.624 
[ 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 13.06   n/a E2020-QM5  
diameter diameter 6.397 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.326   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4225 Hobart           Discovered 1989 Jan. 31 by T. Hioki and N. Kawasato at Okutama.
Joseph R. Hobart (b. 1944) is an electrical engineer, amateur radio operator W7LUX, and minor-planet and variable-star observer. As of March 2011 he has improved the orbits of more than 700 minor planets, many of which were in danger of loss, and discovered 80 minor planets including NEO 2010~RA 91 .
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

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Alternate Designations
 1989 BN = 1982 BC = 1983 GO2 = 1983 JL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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