Astronomy:266 Aline

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Short description: Main-belt asteroid
266 Aline
266 Aline orbit on 01 Jan 2009.png
Orbit of Aline
Discovery
Discovered byJohann Palisa
Discovery date17 May 1887
Designations
(266) Aline
A887 KA
Minor planet categoryMain belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc124.91 yr (45623 d)
|{{{apsis}}}|helion}}3.24229 astronomical unit|AU (485.040 Gm)
|{{{apsis}}}|helion}}2.36559 AU (353.887 Gm)
2.80394 AU (419.463 Gm)
Eccentricity0.15633
Orbital period4.70 yr (1715.0 d)
Average Orbital speed17.79 km/s
Mean anomaly53.2036°
Mean motion0° 12m 35.708s / day
Inclination13.3989°
Longitude of ascending node235.904°
150.489°
Physical characteristics
Dimensions109.09±2.9 km[1]
107.95 ± 6.62 km[2]
Mass(4.15 ± 0.42) × 1018 kg[2]
Mean density6.29 ± 1.32 g/cm3[2]
Rotation period13.018 h (0.5424 d)[1]
13.02 h[3]
Geometric albedo0.0448±0.003
C
Absolute magnitude (H)8.80


Aline (minor planet designation: 266 Aline) is a fairly large main belt asteroid that was discovered by Johann Palisa on 17 May 1887 in Vienna and is thought to have been named after the daughter of astronomer Edmund Weiss. It is a dark C-type asteroid and is probably composed of primitive carbonaceous material. 266 Aline is orbiting close to a 5:2 mean motion resonance with Jupiter, which is located at 2.824 astronomical unit|AU.[4]

Photometric observations made in 2012 at the Organ Mesa Observatory in Las Cruces, New Mexico, produced a light curve with a period of 13.018 ± 0.001 hours and a brightness variation of 0.10 ± 0.01 in magnitude.[3]

In 2001, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.41 AU. The resulting data yielded an effective diameter of 109 ± 15 km.[5]

References

  1. 1.0 1.1 1.2 "266 Aline". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=266;cad=1. 
  2. 2.0 2.1 2.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode2012P&SS...73...98C.  See Table 1.
  3. 3.0 3.1 Pilcher, Frederick (July 2012), "Rotation Period Determinations for 46 Hestia, 223 Rosa, 225 Henrietta, 266 Aline, 750 Oskar, and 765 Mattiaca", The Minor Planet Bulletin 39 (3): pp. 171–173, Bibcode2012MPBu...39..171P. 
  4. Hahn, G. et al. (June 1991), "Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter", Astronomy and Astrophysics 246 (2): 603–618, Bibcode1991A&A...246..603H. 
  5. Magri, Christopher et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003", Icarus 186 (1): 126–151, doi:10.1016/j.icarus.2006.08.018, Bibcode2007Icar..186..126M, http://echo.jpl.nasa.gov/asteroids/MBAs/magri.etal.2007.mbas.pdf, retrieved 2015-04-14. 

External links