Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08427526686146444 3.8341e-08  
a 3.088269707666542 1.2663e-08 au
q 2.828004953912767 1.1874e-07 au
i 9.801715769760088 4.255e-06 deg
node 42.57951750178709 1.9631e-05 deg
peri 162.5643888591542 2.8096e-05 deg
M 222.971240543425 2.1696e-05 deg
tp 2460151.036901680437
(2023-Jul-25.53690168)
0.00012136 TDB
period 1982.308572902457
5.43
1.2193e-05
3.338e-08
d
yr
n .1816064385338833 1.117e-09 deg/d
Q 3.348534461420316 1.373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3433  
   data-arc span      41934 days (114.81 yr)  
   first obs. used      1906-10-17  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40886  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:14:14  

Additional Information
 Earth MOID = 1.82546 au 
 Jupiter MOID = 1.61373 au 
 T_jup = 3.198 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456958.5 (2014-Oct-28.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08286756862270434 3.8574e-08  
q 2.834151356163841 1.1938e-07 au
tp 2456194.667416173145
(2012-Sep-24.16741617)
0.00011549 TDB
node 42.62533489694809 1.9608e-05 deg
peri 164.3780384335593 2.826e-05 deg
i 9.807021727023336 4.2574e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3433  
   data-arc span      41934 days (114.81 yr)  
   first obs. used      1906-10-17  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40886  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:14:14  

Additional Information
 Jupiter MOID = 1.61373 au 
 T_jup = 3.198 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.487933590491978E-15 -4.582754308905111E-15 -5.002768496772875E-13 1.079768102213922E-15 -7.633102421271319E-14 6.468368822565993E-17
q -4.582754308905111E-15 1.425137440886926E-14 1.816864153489341E-12 -4.039594500997304E-15 2.908670314594975E-13 7.046176742085899E-16
tp -5.002768496772875E-13 1.816864153489341E-12 1.333696731749956E-8 -4.037329859584436E-12 2.36246068371978E-9 3.340560658735026E-12
node 1.079768102213922E-15 -4.039594500997304E-15 -4.037329859584436E-12 3.844874910560784E-10 -3.793465153741509E-10 -1.896412045662212E-11
peri -7.633102421271319E-14 2.908670314594975E-13 2.36246068371978E-9 -3.793465153741509E-10 7.986302593066997E-10 1.937023588787614E-11
i 6.468368822565993E-17 7.046176742085899E-16 3.340560658735026E-12 -1.896412045662212E-11 1.937023588787614E-11 1.812540276352221E-11

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 10.41   n/a MPCxxxxx  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-22 12:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin