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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1681182155171783 2.3407e-08  
a 3.176452734653004 1.522e-08 au
q 2.64243316922848 7.4413e-08 au
i 16.14411143379633 9.4245e-07 deg
node 78.51102629132048 2.6116e-06 deg
peri 290.3193352539803 5.8453e-06 deg
M 48.28209908291627 5.095e-06 deg
tp 2458923.170757614238
(2020-Mar-14.67075761)
2.8033e-05 TDB
period 2067.816626767174
5.66
1.4862e-05
4.069e-08
d
yr
n .174096675372431 1.2513e-09 deg/d
Q 3.710472300077528 1.7779e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2743  
   data-arc span      25884 days (70.87 yr)  
   first obs. used      1950-04-22  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41777  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 19:32:32  

Additional Information
 Earth MOID = 1.69468 au 
 Jupiter MOID = 1.93698 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 11.80   n/a E2021B10  
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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