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77594 (2001 KQ21)
Classification: Main-belt Asteroid          SPK-ID: 2077594
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593456387479042 4.3231e-08  
a 3.082775609331657 1.9847e-08 au
q 2.591548760746244 1.3003e-07 au
i 1.921806366133669 5.3156e-06 deg
node 37.43085695468825 0.00011901 deg
peri 312.6085004436587 0.00011994 deg
M 87.29716252088423 1.5435e-05 deg
tp 2458521.087972740884
(2019-Feb-06.58797274)
8.3852e-05 TDB
period 1977.021071813108
5.41
1.9092e-05
5.227e-08
d
yr
n .1820921411170632 1.7585e-09 deg/d
Q 3.574002457917069 2.3009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      893  
   data-arc span      9565 days (26.19 yr)  
   first obs. used      1993-11-20  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4908  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:08:38  

Additional Information
 Earth MOID = 1.58604 au 
 Jupiter MOID = 1.85323 au 
 T_jup = 3.207 
[ 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 14.4   n/a MPO502623  
diameter diameter 7.660 km 0.555 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.40749 h n/a LCDB (Rev. 2019-August); 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 0.063   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

77594 (2001 KQ21)          Discovered 2001-May-17 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 2001 KQ21 = 2000 EP163 = 2002 PW86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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