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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1590456926059972 4.5129e-08  
a 3.081606454179576 2.0838e-08 au
q 2.591490221335475 1.3764e-07 au
i 1.922216565363191 5.5283e-06 deg
node 37.43588908897622 0.00012935 deg
peri 312.5283374696162 0.00013022 deg
M 14.53216136245279 1.5484e-05 deg
tp 2458520.738759424015
(2019-Feb-06.23875942)
8.4821e-05 TDB
period 1975.896488566666
5.41
2.0042e-05
5.487e-08
d
yr
n .1821957790213734 1.848e-09 deg/d
Q 3.571722687023678 2.4152e-08 au
  Orbit Determination Parameters
   # obs. used (total)      808  
   data-arc span      9504 days (26.02 yr)  
   first obs. used      1993-11-20  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50749  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 07:22:23  

Additional Information
 Earth MOID = 1.58506 au 
 Jupiter MOID = 1.85166 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 14.3   n/a MPO449489  
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-January); 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

[ show close-approach data ]
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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