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JPL Small-Body Database Browser
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5541 Seimei (1976 UH16)
Classification: Main-belt Asteroid          SPK-ID: 2005541
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .146580197508742 3.7395e-08  
a 3.181682601652372 1.9488e-08 au
q 2.715310937492039 1.1822e-07 au
i 12.88363529457139 4.3371e-06 deg
node 193.3884489327316 1.7336e-05 deg
peri 199.3952731721479 2.1936e-05 deg
M 181.4322815946825 1.4926e-05 deg
tp 2459628.715521181633
(2022-Feb-18.21552118)
8.9961e-05 TDB
period 2072.925559731883
5.68
1.9045e-05
5.214e-08
d
yr
n .1736675966533807 1.5956e-09 deg/d
Q 3.648054265812705 2.2344e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1796  
   data-arc span      24009 days (65.73 yr)  
   first obs. used      1953-08-16  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4671  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:08:42  

Additional Information
 Earth MOID = 1.72332 au 
 Jupiter MOID = 1.81058 au 
 T_jup = 3.143 
[ 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 12.3   n/a MPO473843  
diameter diameter 13.250 km 0.233 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 25.820 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.145   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

5541 Seimei (1976 UH16)          Discovered 1976-Oct-22 by Kosai and Hurukawa at Kiso
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1976 UH16 = 1976 ST5 = 1987 SJ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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