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2328 Robeson (1972 HW)
Classification: Main-belt Asteroid          SPK-ID: 2002328
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1463756233568443 1.5778e-08  
a 2.341115433861555 6.1755e-09 au
q 1.998433202879741 3.6932e-08 au
i 10.01585521151402 5.8131e-07 deg
node 182.1305737781555 2.6322e-06 deg
peri 340.7676696422699 5.7758e-06 deg
M 310.3644375792801 5.8068e-06 deg
tp 2459576.894426531962
(2021-Dec-28.39442653)
2.1547e-05 TDB
period 1308.376300867636
3.58
5.177e-06
1.417e-08
d
yr
n .2751501993434684 1.0887e-09 deg/d
Q 2.683797664843369 7.0795e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2642  
   data-arc span      17886 days (48.97 yr)  
   first obs. used      1972-04-19  
   last obs. used      2021-04-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43441  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:35:42  

Additional Information
 Earth MOID = 1.00892 au 
 Jupiter MOID = 2.2953 au 
 T_jup = 3.529 
[ 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 13.05   n/a MPCxxxxx  
diameter diameter 12.895 km 2.594 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 18.632 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:
[Higgins, D.; Oey, J. (2007) Minor Planet Bull. 34, 79-80.]
geometric albedo albedo 0.074   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2328 Robeson (1972 HW)          Discovered 1972-Apr-19 by Smirnova, T. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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