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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08442549478143371 3.838e-08  
a 3.087700401634264 1.2766e-08 au
q 2.82701976748946 1.188e-07 au
i 9.802642706238188 4.2584e-06 deg
node 42.57996837608098 1.9661e-05 deg
peri 162.6626195316587 2.8106e-05 deg
M 187.2634914248411 2.1602e-05 deg
tp 2460151.395505638281
(2023-Jul-25.89550564)
0.0001213 TDB
period 1981.760456162249
5.43
1.229e-05
3.365e-08
d
yr
n .1816566673739939 1.1266e-09 deg/d
Q 3.348381035779069 1.3843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3398  
   data-arc span      41779 days (114.38 yr)  
   first obs. used      1906-10-17  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41042  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:25:27  

Additional Information
 Earth MOID = 1.82285 au 
 Jupiter MOID = 1.61496 au 
 T_jup = 3.198 
[ 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 10.42   n/a E2021B10  
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. 2020-October); 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

[ show close-approach data ]
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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