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2182 Semirot (1953 FH1)
Classification: Main-belt Asteroid          SPK-ID: 2002182
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338848559205071 1.438e-08  
a 3.132510802355455 1.1935e-08 au
q 2.713115044912663 4.5172e-08 au
i 2.25786459547657 2.8687e-07 deg
node 51.02014115775585 1.1956e-05 deg
peri 202.0674472528374 1.0717e-05 deg
M 26.33457144737068 6.53e-06 deg
tp 2459052.363852022924
(2020-Jul-21.86385202)
3.6547e-05 TDB
period 2025.057190633409
5.54
1.1573e-05
3.169e-08
d
yr
n .1777727570683557 1.016e-09 deg/d
Q 3.551906559798247 1.3533e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2974  
   data-arc span      24668 days (67.54 yr)  
   first obs. used      1953-03-21  
   last obs. used      2020-10-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44719  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:26:24  

Additional Information
 Earth MOID = 1.69719 au 
 Jupiter MOID = 1.49023 au 
 T_jup = 3.198 
[ 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 11.64   n/a E2021B10  
diameter diameter 24.313 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.328 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Janek, T.; et al. (2013) Minor Planet Bull. 40, 154-156.]
geometric albedo albedo 0.091   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2182 Semirot (1953 FH1)          Discovered 1953-Mar-21 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1953 FH1 = 1937 KF = 1942 FN = 1953 GY = 1955 UT = 1972 TM4 = 1975 EU1 = 1975 EU3 = 1978 VB8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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