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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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 
[ 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 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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