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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2466159524146008 1.8216e-08  
a 2.273025585694858 6.4662e-09 au
q 1.712461216015965 4.189e-08 au
i 2.408680094027174 6.6869e-07 deg
node 114.1052890018527 2.5745e-05 deg
peri 235.1081339208747 2.6378e-05 deg
M 294.7834504607812 3.5186e-06 deg
tp 2459427.256753248610
(2021-Jul-31.75675325)
1.3118e-05 TDB
period 1251.713433879369
3.43
5.3412e-06
1.462e-08
d
yr
n .2876057652303619 1.2273e-09 deg/d
Q 2.833589955373752 8.0609e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2536  
   data-arc span      25891 days (70.89 yr)  
   first obs. used      1949-09-29  
   last obs. used      2020-08-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:55:53  

Additional Information
 Earth MOID = .705774 au 
 Jupiter MOID = 2.59597 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 13.47   n/a E2021B10  
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. 2020-October); 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

[ show close-approach data ]
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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