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7209 Cyrus (3523 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2007209
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0470591349083368 1.5008e-08  
a 2.593173388582277 1.0649e-08 au
q 2.471140892248274 3.8859e-08 au
i 8.859409097361127 7.0373e-07 deg
node 329.9600491228607 4.7055e-06 deg
peri 51.52097343651535 3.2386e-05 deg
M 143.2803227963583 3.0381e-05 deg
tp 2458593.442524342181
(2019-Apr-19.94252434)
0.00012801 TDB
period 1525.266603059115
4.18
9.395e-06
2.572e-08
d
yr
n .2360243116042628 1.4538e-09 deg/d
Q 2.715205884916279 1.115e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2316  
   data-arc span      23021 days (63.03 yr)  
   first obs. used      1958-02-24  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 19:37:03  

Additional Information
 Earth MOID = 1.47913 au 
 Jupiter MOID = 2.49562 au 
 T_jup = 3.400 
[ 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 13.14   n/a E2021B10  
diameter diameter 6.415 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.381 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.297   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7209 Cyrus (3523 P-L)          Discovered 1960-Oct-17 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 3523 P-L = 1958 DJ1 = 1989 QB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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