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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1463666595260412 3.2396e-08  
a 2.340723486690047 6.7999e-09 au
q 1.998119609069077 7.6939e-08 au
i 10.01616970681471 3.9115e-06 deg
node 182.1348646360181 1.9556e-05 deg
peri 340.8277808886913 2.3515e-05 deg
M 256.3637769867123 1.4508e-05 deg
tp 2459577.058688101385
(2021-Dec-28.55868810)
5.3497e-05 TDB
period 1308.047744070312
3.58
5.6999e-06
1.561e-08
d
yr
n .2752193118576631 1.1993e-09 deg/d
Q 2.683327364311018 7.7951e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      17806 days (48.75 yr)  
   first obs. used      1972-04-19  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .433  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:02:08  

Additional Information
 Earth MOID = 1.00747 au 
 Jupiter MOID = 2.2964 au 
 T_jup = 3.530 
[ 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 13.04   n/a E2021B10  
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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