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14120 Espenak (1998 QJ54)
Classification: Main-belt Asteroid          SPK-ID: 2014120
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08797445177810231 4.2315e-08  
a 2.38448974898018 9.018e-09 au
q 2.174715570543144 1.0092e-07 au
i 5.989857341045454 4.9647e-06 deg
node 222.9514471587878 3.2553e-05 deg
peri 212.5421584135674 3.9923e-05 deg
M 153.3732742950317 2.51e-05 deg
tp 2458027.520868343270
(2017-Oct-01.02086834)
9.2194e-05 TDB
period 1344.905025628085
3.68
7.6296e-06
2.089e-08
d
yr
n .2676768940110668 1.5185e-09 deg/d
Q 2.594263927417217 9.8114e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1762  
   data-arc span      14138 days (38.71 yr)  
   first obs. used      1980-12-10  
   last obs. used      2019-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49497  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:16:49  

Additional Information
 Earth MOID = 1.19181 au 
 Jupiter MOID = 2.61884 au 
 T_jup = 3.523 
[ 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 13.6   n/a MPO337378  
diameter diameter 13.20 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
geometric albedo albedo 0.0368   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

14120 Espenak           Discovered 1998 Aug. 27 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Fred Espenak Jr. (b. 1952), of NASA Goddard Space Flight Center, is widely recognized for his calculations of solar eclipses, his magnificent maps of these phenomena and his book Totality: Eclipses of the Sun.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 QJ54 = 1980 XJ2 = 1987 SK25 = 2000 AG237 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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