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7131 Longtom (1992 YL)
Classification: Main-belt Asteroid          SPK-ID: 2007131
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1680171525909888 3.9857e-08  
a 3.17656980571936 2.163e-08 au
q 2.642851591955883 1.3341e-07 au
i 16.14536246149126 4.0885e-06 deg
node 78.50990357677776 1.4664e-05 deg
peri 290.1153593638491 1.8774e-05 deg
M 303.9726406767579 1.2084e-05 deg
tp 2458922.335305821666
(2020-Mar-13.83530582)
6.9729e-05 TDB
period 2067.930944725727
5.66
2.1121e-05
5.783e-08
d
yr
n .1740870510778817 1.7781e-09 deg/d
Q 3.710288019482838 2.5264e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2165  
   data-arc span      25422 days (69.60 yr)  
   first obs. used      1950-04-22  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45664  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 21:39:54  

Additional Information
 Earth MOID = 1.69578 au 
 Jupiter MOID = 1.93575 au 
 T_jup = 3.118 
[ 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 11.7   n/a MPO332886  
diameter diameter 29.896 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.051   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

7131 Longtom           Discovered 1992 Dec. 23 by A. Natori and T. Urata at the JCPM Yakiimo Station.
Longtom, the nine-pound cannon in Treasure Island, is the nickname of the Nikon 10-cm refractor used regularly by Hoei Nojiri (1885-1977), who ordered the telescope and translated Stevenson's novel into Japanese in 1928. The telescope was at one time also used by Tokyo astronomer Koichiro Tomita.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19991123/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1992 YL = 1969 VW1 = 1982 BV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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