3728 IRAS

3728 IRAS
Discovery [1]
Discovered by IRAS
Discovery date 23 August 1983
Designations
MPC designation 3728 IRAS
Named after
 IRAS (space observatory)[2]
1983 QF · 1948 RN
1963 FA · 1972 FH
1976 GL · 1985 GT
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 67.75 yr (24,746 days)        
Aphelion 3.2135 AU
Perihelion 2.0850 AU
2.6493 AU
Eccentricity 0.2130
4.31 yr (1,575 days)
184.96°
0° 13m 42.96s / day
Inclination 22.596°
167.37°
281.08°
Physical characteristics
Dimensions 19.41 km (derived)[3]
19.55±1.7 km (IRAS:12)[1]
19.83±0.38 km[4]
21.40±0.38 km[5]
27.480±0.177 km[6]
8.323±0.002 h[7]
0.0352±0.0015[6]
0.086±0.015[4]
0.0815 (derived)[3]
0.101±0.004[5]
0.1161±0.023 (IRAS:12)[1]
CX [8] · S [3]
11.50[5][6]
11.80[4]
11.9[1][3]
12.20±0.23[8]

    3728 IRAS, provisional designation 1983 QF, is a stony asteroid from the middle region of the asteroid belt, approximately 20 kilometers in diameter. On 23 August 1983, it was discovered by and later named after IRAS, a spaceborne all-sky infrared survey satellite.[9]

    The S-type asteroid is also classified as a CX-type by Pan-STARRS' large-scale survey.[8] It orbits the Sun at a distance of 2.1–3.2 AU once every 4 years and 4 months (1,575 days). Its orbit shows an eccentricity of 0.21 and an inclination of 23 degrees from the plane of the ecliptic.[1] The first used precovery was taken at Palomar Observatory in 1950, extending the asteroid's observation arc by 33 years prior to its discovery.[9]

    In August 2008, a photometric light-curve analysis by U.S. astronomer Brian Warner at his Palmer Divide Observatory (716), Colorado, gave a well-defined rotation period of 8.323±0.002 hours with a brightness amplitude of 0.21 in magnitude (U=3).[7]

    According to 12 observations by the discovering Infrared Astronomical Satellite, IRAS, the asteroid has an albedo of 0.12 and a diameter of 19.6 kilometers. The Collaborative Asteroid Lightcurve Link derives similar figures, as do the space-based surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer.[3][5][4] Only the post-cryogenic NEOWISE mission finds a much lower albedo of 0.035 and, correspondingly, a larger diameter of 27.5 kilometers.[6]

    The minor planet was named for the discovering Infrared Astronomical Satellite (IRAS), a collaboration between the United States (NASA), the Netherlands (NIVR), and the United Kingdom (SERC), which observed more than 250,000 celestial bodies in the infrared at wavelengths between 12 and 100 µm during 10 months in 1983. IRAS has also discovered two other minor planets, the 11-kilometer sized main-belt asteroid (10714) 1983 QG[10] and 3200 Phaethon, a near-Earth and potentially hazardous object, parent body of the Geminid meteor shower, as well as six comets, such as 126P/IRAS, a short-period Jupiter family comet, which was also named after the discovering space observatory.[2][11] Naming citation was published on 4 May 1999 (M.P.C. 34619).[12]

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 3728 IRAS (1983 QF)" (2015-06-14 last obs.). Jet Propulsion Laboratory. Retrieved 1 February 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (3728) IRAS. Springer Berlin Heidelberg. p. 315. ISBN 978-3-540-00238-3. Retrieved 1 February 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (3728) IRAS". Asteroid Lightcurve Database (LCDB). Retrieved 1 February 2016.
    4. 1 2 3 4 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 1 February 2016.
    5. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 1 February 2016.
    6. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 1 February 2016.
    7. 1 2 Warner, Brian D. (January 2009). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September". The Minor Planet Bulletin. 36 (1): 7–13. Bibcode:2009MPBu...36....7W. ISSN 1052-8091. Retrieved 1 February 2016.
    8. 1 2 3 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 3 July 2016.
    9. 1 2 "3728 IRAS (1983 QF)". Minor Planet Center. Retrieved 1 February 2016.
    10. ↑ "10714 (1983 QG)". Minor Planet Center. Retrieved 3 July 2016.
    11. ↑ "JPL Small-Body Database Browser: 126P/IRAS". Jet Propulsion Laboratory. Retrieved 1 February 2016.
    12. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 July 2016.

    External links

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