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21024 (1989 GD3)
Classification: Main-belt Asteroid          SPK-ID: 2021024
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .168138664026001 3.3136e-08  
a 2.596914484148585 9.9752e-09 au
q 2.16027275219407 8.329e-08 au
i 13.46505579951991 3.5953e-06 deg
node 216.3266418386137 1.4991e-05 deg
peri 48.93756892671232 1.8865e-05 deg
M 159.6326388428652 1.2188e-05 deg
tp 2458522.696055395411
(2019-Feb-08.19605540)
5.0294e-05 TDB
period 1528.568479644338
4.18
8.8073e-06
2.411e-08
d
yr
n .2355144730472027 1.357e-09 deg/d
Q 3.033556216103099 1.1652e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1933  
   data-arc span      11643 days (31.88 yr)  
   first obs. used      1989-04-03  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47142  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:36:14  

Additional Information
 Earth MOID = 1.16902 au 
 Jupiter MOID = 2.07 au 
 T_jup = 3.358 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457502.5 (2016-Apr-24.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682290214530408 3.3049e-08  
q 2.160007460456322 8.3062e-08 au
tp 2456995.531404411445
(2014-Dec-04.03140441)
4.8168e-05 TDB
node 216.3367349045492 1.4981e-05 deg
peri 49.16508940813671 1.8863e-05 deg
i 13.46939553600886 3.5967e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1933  
   data-arc span      11643 days (31.88 yr)  
   first obs. used      1989-04-03  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47142  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:36:14  

Additional Information
 Jupiter MOID = 2.07 au 
 T_jup = 3.358 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.092238432885577E-15 -2.733276273494201E-15 1.9171437424312E-13 -5.911151861676276E-15 2.298835156503022E-14 -2.383286756964619E-15
q -2.733276273494201E-15 6.899325679608165E-15 -4.356371545701877E-13 1.341042900831986E-14 -4.280114410736571E-14 5.992749349552006E-15
tp 1.9171437424312E-13 -4.356371545701877E-13 2.320157944404755E-9 -3.308780808552744E-12 5.625639502664823E-10 -7.531329060168947E-12
node -5.911151861676276E-15 1.341042900831986E-14 -3.308780808552744E-12 2.244269871725544E-10 -2.18903282549688E-10 -3.334916534128162E-12
peri 2.298835156503022E-14 -4.280114410736571E-14 5.625639502664823E-10 -2.18903282549688E-10 3.558272214398781E-10 1.58554031864235E-12
i -2.383286756964619E-15 5.992749349552006E-15 -7.531329060168947E-12 -3.334916534128162E-12 1.58554031864235E-12 1.293645007470835E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.98   n/a MPCxxxxx  
diameter diameter 4.311 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.76534 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.329   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21024 (1989 GD3)          Discovered 1989-Apr-03 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 GD3 = 1998 QE64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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