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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04691234080700448 3.7346e-08  
a 2.593437087235923 1.191e-08 au
q 2.471772882737986 1.0002e-07 au
i 8.8588413364464 4.9266e-06 deg
node 329.9606041527418 2.285e-05 deg
peri 51.57187217773284 5.8016e-05 deg
M 96.03966295674108 5.2216e-05 deg
tp 2458593.532124434668
(2019-Apr-20.03212443)
0.00022104 TDB
period 1525.499264501906
4.18
1.0508e-05
2.877e-08
d
yr
n .2359883143683746 1.6256e-09 deg/d
Q 2.715101291733859 1.2468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2080  
   data-arc span      22705 days (62.16 yr)  
   first obs. used      1958-02-24  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:43:44  

Additional Information
 Earth MOID = 1.48132 au 
 Jupiter MOID = 2.49581 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 13.1   n/a MPO452270  
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. 2019-August); 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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