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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04705913503741892 1.4463e-08  
a 2.593173389167943 1.0453e-08 au
q 2.471140892471648 3.7928e-08 au
i 8.859409101118766 7.0372e-07 deg
node 329.9600491705318 4.7012e-06 deg
peri 51.52097331316011 3.0868e-05 deg
M 143.2803228903322 2.9189e-05 deg
tp 2458593.442523738372
(2019-Apr-19.94252374)
0.00012272 TDB
period 1525.266603575836
4.18
9.2222e-06
2.525e-08
d
yr
n .2360243115243038 1.4271e-09 deg/d
Q 2.715205885864239 1.0945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2359  
   data-arc span      23038 days (63.07 yr)  
   first obs. used      1958-02-24  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44679  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 23:20:13  

Additional Information
 Earth MOID = 1.47913 au 
 Jupiter MOID = 2.49562 au 
 T_jup = 3.400 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457072.5 (2015-Feb-19.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04638730991853419 1.5181e-08  
q 2.472599563689923 3.997e-08 au
tp 2457059.266930781391
(2015-Feb-05.76693078)
0.00012117 TDB
node 330.0537870100997 4.6923e-06 deg
peri 49.42225933002012 3.0964e-05 deg
i 8.868532957001763 7.0432e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2359  
   data-arc span      23038 days (63.07 yr)  
   first obs. used      1958-02-24  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44679  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 23:20:13  

Additional Information
 Jupiter MOID = 2.49562 au 
 T_jup = 3.400 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.304762236053154E-16 -5.877793519269101E-16 -1.354914607701246E-12 3.644009639344379E-15 -3.443960575016182E-13 -1.032152465674941E-15
q -5.877793519269101E-16 1.597590372528365E-15 3.739030152420703E-12 -9.67742420267784E-15 9.499983606851785E-13 2.821141906658341E-15
tp -1.354914607701246E-12 3.739030152420703E-12 1.468273164108139E-8 -2.868919577912513E-11 3.703993008042012E-9 4.403877732260123E-12
node 3.644009639344379E-15 -9.67742420267784E-15 -2.868919577912513E-11 2.201785793101257E-11 -3.004858465114321E-11 2.546737982395727E-12
peri -3.443960575016182E-13 9.499983606851785E-13 3.703993008042012E-9 -3.004858465114321E-11 9.58778770990531E-10 -1.551365457938434E-12
i -1.032152465674941E-15 2.821141906658341E-15 4.403877732260123E-12 2.546737982395727E-12 -1.551365457938434E-12 4.960651425432221E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.15   n/a MPCxxxxx  
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

Alternate Designations
 3523 P-L = 1958 DJ1 = 1989 QB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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