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JPL Small-Body Database Browser
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1731 Smuts (1948 PH)
Classification: Main-belt Asteroid          SPK-ID: 2001731
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1279034768107212 3.4263e-08  
a 3.165328022999864 1.3918e-08 au
q 2.760471563611775 1.0827e-07 au
i 5.935087546640822 3.943e-06 deg
node 152.4725445543336 3.476e-05 deg
peri 203.4406052069406 3.7598e-05 deg
M 216.2477243038518 1.4897e-05 deg
tp 2459821.869814947377
(2022-Aug-30.36981495)
8.6843e-05 TDB
period 2056.963146837882
5.63
1.3567e-05
3.714e-08
d
yr
n .1750152891914564 1.1543e-09 deg/d
Q 3.570184482387953 1.5698e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2822  
   data-arc span      34059 days (93.25 yr)  
   first obs. used      1926-10-05  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44484  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:13:12  

Additional Information
 Earth MOID = 1.75694 au 
 Jupiter MOID = 1.86745 au 
 T_jup = 3.183 
[ 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 10.5   n/a MPO347531  
diameter diameter 54.784 km 0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.5 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:
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.058   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1731 Smuts (1948 PH)          Discovered 1948-Aug-09 by Johnson, E. L. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1948 PH = 1926 TF = 1931 QA = 1935 FS = 1938 YB = 1941 KG = 1947 LC = 1948 PP = 1954 SX = 1960 WE = 1966 UY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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