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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 ]

[ 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 
[ 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 10.41   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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1918-May-19 04:51 00:02 Jupiter 1.99079532519302 1.99079407035822 1.99079658002918 3.54345512158963 3.42127686398464 2421732.701933139 1.92617407463599 109.778850396171 13.9017549896673 -58.8801154430584 3902421.19275992 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
1928-Apr-16 10:24 00:02 Jupiter 1.64019428371696 1.64019389976233 1.64019466767356 3.01404716961673 2.83754267174021 2425352.933017175 1.73335742235822 192.121367329743 10.6362240510491 -85.3207595110095 2904823.79047433 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
1988-Aug-10 21:31 < 00:01 Jupiter 1.72312740197635 1.72312694086878 1.72312786308461 3.23759259985684 3.08202587837981 2447384.396564857 0.546876146025086 89.9865957671654 10.4549312850149 -78.7969557382138 3117376.23808328 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
1998-Jul-01 20:27 < 00:01 Jupiter 1.7932198949131 1.79321950508908 1.79322028473701 2.81933144874706 2.64649490645171 2450996.351738163 0.387185573267277 70.6627202240514 15.7029782488108 -88.0368550887918 3122225.61794111 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
2048-Dec-10 08:41 < 00:01 Jupiter 1.99278382673219 1.99278338108708 1.99278427237752 3.42911544553869 3.30283863220525 2469420.861631485 0.695238397429814 49.8939961731453 10.1166992238765 -68.8295982822132 4592588.70190291 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
2058-Nov-06 23:16 < 00:01 Jupiter 1.63573356292472 1.63573317230165 1.63573395354956 3.06155916948421 2.88747225809582 2473039.469270840 0.883436946012467 173.053515773285 10.5748866736014 -85.1901416677811 2960865.30050152 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
2119-Mar-01 23:40 00:02 Jupiter 1.72738716784941 1.72738634368839 1.72738799201445 3.18226028839036 3.02424909880998 2495068.486456942 2.0963464881036 155.098502566778 10.5079393127445 -75.6329175506498 3067207.62323868 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
2129-Jan-22 21:45 00:02 Jupiter 1.78267492717012 1.78267379458793 1.78267605975992 2.92476660902951 2.75753097625962 2498683.406543793 2.40425692219584 218.154087703267 21.6294410480897 -76.23449639464 3076259.64132702 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
2179-Jul-02 14:31 00:03 Jupiter 1.99851848913019 1.99851669622319 1.99852028204025 3.32063110465633 3.19044519157297 2517106.105145436 3.33306712762679 156.606612477299 12.7427902010617 -58.134753346391 3912974.32610189 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14
2189-May-26 06:10 00:03 Jupiter 1.62971213512421 1.62971167971254 1.62971259054061 3.09104973879795 2.91806673798831 2520721.757187507 3.45612451338147 210.094613400926 10.2770347380971 -84.4996911012508 2965583.79779629 T 41 CATAB v2.0g-lin.ifort 2021-Aug-25 21:14:46 2021-Aug-25 21:14

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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