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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1679372427612424 3.9718e-08  
a 3.175557311020305 2.1252e-08 au
q 2.642262971977249 1.3317e-07 au
i 16.14521016514647 4.0153e-06 deg
node 78.50908258835794 1.4664e-05 deg
peri 290.2653972001065 1.8666e-05 deg
M 13.5092936826728 1.2008e-05 deg
tp 2458922.936302882441
(2020-Mar-14.43630288)
6.8857e-05 TDB
period 2066.942330089066
5.66
2.0749e-05
5.681e-08
d
yr
n .1741703165876367 1.7484e-09 deg/d
Q 3.70885165006336 2.4821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2216  
   data-arc span      25474 days (69.74 yr)  
   first obs. used      1950-04-22  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45059  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:21:37  

Additional Information
 Earth MOID = 1.69583 au 
 Jupiter MOID = 1.93761 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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