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4909 Couteau (1949 SA1)
Classification: Main-belt Asteroid          SPK-ID: 2004909
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2465493887259986 3.1195e-08  
a 2.272777405074965 6.9854e-09 au
q 1.712425525143471 7.2182e-08 au
i 2.408657642581638 3.1216e-06 deg
node 114.1056041456698 7.8015e-05 deg
peri 235.1357942145361 7.8212e-05 deg
M 237.217398408249 7.2788e-06 deg
tp 2459427.342949371226
(2021-Jul-31.84294937)
2.6443e-05 TDB
period 1251.508436712951
3.43
5.7697e-06
1.58e-08
d
yr
n .2876528750741219 1.3261e-09 deg/d
Q 2.833129285006459 8.7076e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2344  
   data-arc span      25778 days (70.58 yr)  
   first obs. used      1949-09-29  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49359  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:14:04  

Additional Information
 Earth MOID = .707514 au 
 Jupiter MOID = 2.59585 au 
 T_jup = 3.569 
[ 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 13.4   n/a MPO421679  
diameter diameter 5.324 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.054 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2014) http://www.asu.cas.cz/~ppravec/neo.htm]
[Clark, M. (2015) Minor Planet Bull. 42, 15-20.]
[Klinglesmith, D.A.; Dehart, A.; Hanowell, J.; Henderickx, S. (2015) Minor Planet Bull. 42, 101-104.]
geometric albedo albedo 0.278   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4909 Couteau (1949 SA1)          Discovered 1949-Sep-28 by Laugier, M. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1949 SA1 = 1949 SD = 1949 TJ = 1949 UG1 = 1959 NK = 1966 QO = 1973 SW3 = 1990 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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