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JPL Small-Body Database Browser
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12084 Unno (1998 FL125)
Classification: Main-belt Asteroid          SPK-ID: 2012084
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09439920562583902 4.9904e-08  
a 2.581043173393256 1.1563e-08 au
q 2.337394748138938 1.2681e-07 au
i 13.41258253642085 4.9772e-06 deg
node 201.8804505497139 1.6418e-05 deg
peri 28.43267184475078 2.6544e-05 deg
M 90.43695812905899 1.8664e-05 deg
tp 2458620.017421562246
(2019-May-16.51742156)
7.9111e-05 TDB
period 1514.576906071097
4.15
1.0178e-05
2.787e-08
d
yr
n .2376901420832181 1.5973e-09 deg/d
Q 2.824691598647573 1.2655e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1661  
   data-arc span      10260 days (28.09 yr)  
   first obs. used      1991-09-17  
   last obs. used      2019-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48438  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:14:25  

Additional Information
 Earth MOID = 1.33687 au 
 Jupiter MOID = 2.15811 au 
 T_jup = 3.380 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4   n/a MPO384863  
diameter diameter 5.471 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.310   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12084 Unno           Discovered 1998 Mar. 22 by T. Seki at Geisei.
Juza Unno (Sano Shoichi, 1897-1949) was a mystery writer and pioneer of Japanese science fiction. The Martian Army, published in 1940, aroused the curiosity of young Japanese about space. A monument dedicated to him stands in the park in Tokusima, his native city.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

Alternate Designations
 1998 FL125 = 1991 SW4 = 1994 GQ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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