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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1457997109318867 3.6057e-08  
a 2.341912841468456 7.8559e-09 au
q 2.000462626154682 8.4214e-08 au
i 10.01348965064367 4.1609e-06 deg
node 182.1666314151335 2.3275e-05 deg
peri 341.0130181510933 2.7167e-05 deg
M 91.02665875450275 1.4545e-05 deg
tp 2458269.505620081706
(2018-May-31.00562008)
5.2466e-05 TDB
period 1309.044827097881
3.58
6.5867e-06
1.803e-08
d
yr
n .2750096807594518 1.3838e-09 deg/d
Q 2.68336305678223 9.0013e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1993  
   data-arc span      17362 days (47.53 yr)  
   first obs. used      1972-04-19  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47281  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:34:00  

Additional Information
 Earth MOID = 1.01049 au 
 Jupiter MOID = 2.29836 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 13.0   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-January); 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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