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JPL Small-Body Database Browser
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1421 Esperanto (1936 FQ)
Classification: Main-belt Asteroid          SPK-ID: 2001421
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08455924963272107 3.9251e-08  
a 3.089272178764803 1.4208e-08 au
q 2.828045641417209 1.2238e-07 au
i 9.802962935751134 4.4071e-06 deg
node 42.5948370668544 2.2968e-05 deg
peri 163.1778655981794 3.2446e-05 deg
M 77.70514552176306 2.3156e-05 deg
tp 2458172.415045729232
(2018-Feb-22.91504573)		 0.00012714 TDB
period 1983.27385532422
5.43		 1.3682e-05
3.746e-08		 d
yr
n .1815180485708305 1.2523e-09 deg/d
Q 3.350498716112396 1.541e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2730  
   data-arc span      41321 days (113.13 yr)  
   first obs. used      1906-10-17  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:59:52  

Additional Information
 Earth MOID = 1.82482 au 
 Jupiter MOID = 1.61493 au 
 T_jup = 3.197 
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[ 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 10.4   n/a MPO452179  
diameter diameter 43.31 km 3.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 21.982 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Ferrero, A. (2012) Minor Planet Bull. 39, 138-139.]
geometric albedo albedo 0.0714   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

1421 Esperanto (1936 FQ)          Discovered 1936-Mar-18 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1936 FQ = 1931 HC = 1958 GD = A906 UD = A917 XD = A920 GD 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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