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6469 Armstrong (1982 PC)
Classification: Main-belt Asteroid          SPK-ID: 2006469
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 .2037796873531659 1.2178e-08  
a 2.219786694819592 5.248e-09 au
q 1.767439256158538 2.7653e-08 au
i 3.959073711582291 5.6854e-07 deg
node 159.3749830256918 4.8608e-06 deg
peri 150.6900431888998 8.0084e-06 deg
M 223.9498573062899 4.3778e-06 deg
tp 2459657.022086641987
(2022-Mar-18.52208664)
1.5219e-05 TDB
period 1207.995434162184
3.31
4.2839e-06
1.173e-08
d
yr
n .2980143714282176 1.0568e-09 deg/d
Q 2.672134133480645 6.3174e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1753  
   data-arc span      18778 days (51.41 yr)  
   first obs. used      1969-10-16  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50976  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:47:30  

Additional Information
 Earth MOID = .752418 au 
 Jupiter MOID = 2.59853 au 
 T_jup = 3.620 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.48   n/a E2021B10  
diameter diameter 3.720 km 0.392 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.965 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.243   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6469 Armstrong (1982 PC)          Discovered 1982-Aug-14 by Mrkos, A. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 PC = 1969 UK1 = 1972 NN = 1979 WZ6 = 1982 QL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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