- (4197) 1982 TA
Infobox Planet | minorplanet = yes | width = 25em | bgcolour = #FFFFC0
name=(4197) 1982 TA
discovery=yes
discovery_ref= [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html]
discoverer=E. F. Helin and E. M. Shoemaker
discovered=October 11 ,1982
alt_names="none"
mp_category=Apollo, Mars-crosser, Venus-crosser
orbit_ref= [ftp://ftp.lowell.edu/pub/elgb/astorb.html]
epoch=December 31 ,2006 (JD 2454100.5)
semimajor=344.143 Gm (2.300 AU)
perihelion=78.708 Gm (0.526 AU)
aphelion=609.578 Gm (4.075 AU)
eccentricity=0.771
period=1274.441 d (3.49 a)
inclination=12.219°
asc_node=10.001°
arg_peri=119.441°
mean_anomaly=317.807°
avg_speed=16.27 km/s
physical_characteristics=yes
dimensions=1.7 km
mass=~5.1e|12 kg
density=2.0? g/cm³
surface_grav=~0.0005 m/s²
escape_velocity=~0.0009 km/s
sidereal_day=0.147418±0.000002 d (3.53802±0.00005 h) [P. Pravec, L. Šarounová, M. Wolf, I. R. V. Ferrin, J. Zhu : "CCD photometry of asteroids (4197) 1982 TA and mp|1997 LY|4", Planetary and Space Science , Vol. 48, No. 1, pp. 59-65 (2000) http://abob.libs.uga.edu/bobk/ccc/cc032100.html]
axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
spectral_type=?
abs_magnitude=14.6
albedo=0.10?
single_temperature=~183 K(4197) 1982 TA was discovered on
October 11 ,1982 byEleanor F. Helin andEugene Shoemaker . It is an Apollo, Mars- andVenus-crosser asteroid , only 1.7 km in diameter.In
1996 , astronomers at theGoldstone Observatory analysed it usingradar delay-Doppler imaging. The resultant images are not very clear, but they show that (4197) 1982 TA has a roughly triangular shape, and a 3-hour rotation period.References
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