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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1463532826822971 3.5838e-08  
a 2.340540089182898 7.7052e-09 au
q 1.997994363881465 8.3646e-08 au
i 10.01647842689939 4.1246e-06 deg
node 182.1354404365363 2.314e-05 deg
peri 340.8771005461554 2.6957e-05 deg
M 201.253483638043 1.4572e-05 deg
tp 2459577.232275022236
(2021-Dec-28.73227502)		 5.3933e-05 TDB
period 1307.89401724321
3.58		 6.4585e-06
1.768e-08		 d
yr
n .2752516604967816 1.3592e-09 deg/d
Q 2.683085814484332 8.8329e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2013  
   data-arc span      17404 days (47.65 yr)  
   first obs. used      1972-04-19  
   last obs. used      2019-12-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47411  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:18:38  

Additional Information
 Earth MOID = 1.00763 au 
 Jupiter MOID = 2.29751 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 13.0   n/a MPO384770  
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. 2019-August); 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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