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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08454431600742911 3.8586e-08  
a 3.087438036846986 1.3782e-08 au
q 2.826412699806438 1.1991e-07 au
i 9.803120277406249 4.3242e-06 deg
node 42.57858643328046 2.297e-05 deg
peri 162.7471106897262 3.2459e-05 deg
M 150.8291634342945 2.3226e-05 deg
tp 2458170.307847515819
(2018-Feb-20.80784752)
0.00012696 TDB
period 1981.507873472369
5.43
1.3268e-05
3.633e-08
d
yr
n .1816798231384974 1.2165e-09 deg/d
Q 3.348463373887534 1.4948e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2766  
   data-arc span      41354 days (113.22 yr)  
   first obs. used      1906-10-17  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43456  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:54:29  

Additional Information
 Earth MOID = 1.82314 au 
 Jupiter MOID = 1.61601 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 10.4   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-August); 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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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 04:50 00:02 Jupiter 1.99079482519981 1.99079353813113 1.99079611227019 3.54345449604118 3.42127618417674 2421732.701339345 2.04453298303386 116.541301598381 15.9933753506971 -60.053528270138 3413237.92736128 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
1928-Apr-16 10:23 00:02 Jupiter 1.64019435262203 1.6401939599523 1.64019474529371 3.01404709584295 2.83754260001769 2425352.932507490 1.83101554387196 196.893691012019 12.0900648188353 -85.4828977512918 2878822.82971128 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
1988-Aug-10 21:31 < 00:01 Jupiter 1.72312742545617 1.72312695685005 1.72312789406317 3.23759290905751 3.08202620447973 2447384.396551699 0.559106152174975 97.0998985313324 11.152327261364 -79.5709559511651 3052319.88535755 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
1998-Jul-01 20:27 < 00:01 Jupiter 1.79321987865694 1.79321946473695 1.79322029257694 2.81933163236799 2.64649509946054 2450996.351757890 0.389716956334599 74.1899323889781 17.808583577566 -89.2512015909327 3010634.39712713 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
2048-Dec-10 08:41 < 00:01 Jupiter 1.99278392191964 1.99278336166947 1.99278448217004 3.42911564497041 3.30283884469793 2469420.861682735 0.780031873625007 57.3781521734922 13.0075463111996 -67.1291896194212 3782270.3281691 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
2058-Nov-06 23:16 < 00:01 Jupiter 1.63573353005573 1.63573313354308 1.63573392657005 3.06155954261827 2.88747264913198 2473039.469367082 0.990601415617897 178.803356443684 11.7807752938739 -85.4618862574362 2939215.55779197 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
2119-Mar-01 23:41 00:02 Jupiter 1.727387317239 1.72738636842091 1.72738826606218 3.18226058939091 3.0242494286638 2495068.486612169 2.29513543880129 174.480395061708 12.4323362531102 -75.4151284147004 2875210.62616707 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
2129-Jan-22 21:46 00:03 Jupiter 1.78267481730108 1.78267354153759 1.78267609307419 2.92476681909369 2.75753118749213 2498683.406659760 2.62981380986238 244.466602362732 24.9109351351968 -76.2791521517606 3005304.06514183 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
2179-Jul-02 14:31 00:04 Jupiter 1.99851845016231 1.99851643648263 1.99852046384552 3.32063108500811 3.19044516779893 2517106.104942975 3.61849625357979 171.494548617252 15.2582163236223 -57.5112562948462 3235179.73831533 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54
2189-May-26 06:10 00:04 Jupiter 1.62971214124527 1.6297116728241 1.62971260967162 3.09104991080448 2.91806691987642 2520721.756936482 3.75736842480979 222.559241021629 11.498668468452 -84.7055569296955 2945893.91778868 T 32 CATAB v2.0f-lin.ifort 2020-Feb-22 15:54:38 2020-Feb-22 15:54

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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