706 Hirundo

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706 Hirundo
000706-asteroid shape model (706) Hirundo.png
Modelled shape of Hirundo from its lightcurve
Discovery [1]
Discovered by J. Helffrich
Discovery site Heidelberg Obs.
Discovery date9 October 1910
Designations
(706) Hirundo
Pronunciation /hɪˈrʌndoʊ/ [2]
Named after
 Hirundo (swallows) [3]
(Genus of birds)
A910 TF ·1948 AE
1957 DA ·1977 QB
A924 WD ·1910 KX
Adjectives Hirundinian /hɪrənˈdɪniən/ [8]
Orbital characteristics [4]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc 109.55 yr (40,014 d)
Aphelion 3.2601 AU
Perihelion 2.1987 AU
2.7294 AU
Eccentricity 0.1944
4.51 yr (1,647 d)
124.52°
0° 13m 6.96s / day
Inclination 14.431°
325.34°
31.090°
Physical characteristics
22.027±0.005  h [12] [a]
  • (92°, 66°) (λ1/β1) [6]
  • (244°, 54°) (λ2/β2) [6]
SMASS = Cgh [4]

    706 Hirundo ( prov. designation:A910 TFor1910 KX) is an elongated background asteroid, located in the central region of the asteroid belt. It was discovered by German astronomer Joseph Helffrich at the Heidelberg Observatory on 9 October 1910. [1] The carbonaceous C-type asteroid (Cgh) has a rotation period of 22.0 hours and measures approximately 30 kilometers (19 miles) in diameter. It was named after the bird genus Hirundo , commonly known as swallows. [3]

    Contents

    Orbit and classification

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    Orbit of    706 Hirundo (2000–2020)
       Earth ·   Mars ·  Jupiter

    Hirundo is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [5] [6] [7]

    It orbits the Sun in the central asteroid belt at a distance of 2.2–3.3  AU once every 4 years and 6 months (1,647 days; semi-major axis of 2.73 AU). Its orbit has an eccentricity of 0.19 and an inclination of 14° with respect to the ecliptic. [4] The body's observation arc begins at Vienna Observatory on 16 October 1910, or six nights after its official discovery observation by Joseph Helffrich at Heidelberg. [1]

    Naming

    This minor planet was named after bird genus Hirundo , a group of passerines in the family Hirundinidae (swallows and martins). [3] "Hirundo" is the Latin word for swallow. The naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 71 ). [3]

    Physical characteristics

    In both the Bus–Binzel (SMASS-II) and the Bus–DeMeo classification, Hirundo is a carbonaceous C-type asteroid (Cgh). [4] [6] [13]

    Rotation period and poles

    In September 2000, a rotational lightcurve of Hirundo was obtained from photometric observations by American Brian Warner at the Palmer Divide Observatory ( 716 ) in Colorado. Lightcurve analysis gave a rotation period of 22.027±0.005 hours with a high brightness variation of 0.9±0.03 magnitude, indicative of an elongated shape ( U=3 ). [12] [a] During the same opposition, Bill Holliday measures a period of (22.00±0.025  h ) and an amplitude of (0.75±0.02) magnitude at his River Oaks Observatory ( 915 ) in New Braunfels, Texas ( U=3 ). [14] Further observations by René Roy (2011), Patrice Le Guen (2018), and Anaël Wünsche and Raoul Behrend (2020) determined a period of (22.002±0.003 h), (22.0±0.5 h) and (22.00248 h) with an amplitude of (0.39±0.01), (0.68±0.05) and (0.15±0.04) magnitude, respectively ( U=3/2/n.a. ). [15]

    Two lightcurves, published in 2016, using modeled photometric data from the Lowell Photometric Database (LPD) and other sources, gave a concurring period of (22.0160±0.0005) and (22.0161±0.0001) hours, respectively. Each modeled lightcurve also determined two spin axes of (92°, 66°) and (244°, 54°), as well as (91°, 70°) and (250°, 45°) in ecliptic coordinates (λ, β), respectively. [6] [16] [17] [18]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Hirundo measures (29.22±1.5), (29.36±0.79) and (30.819±0.553) kilometers in diameter and its surface has an albedo of (0.1721±0.019), (0.172±0.011) and (0.081±0.011), respectively. [9] [10] [11]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0853 and a diameter of 28.70 kilometers based on an absolute magnitude of 11. [16] The WISE-team also published two alternative mean-diameters of (24.44±8.42  km ) and (24.72±4.69 km) with a corresponding albedos of (0.09±0.07) and (0.09±0.03). [6] [16]

    Notes

    1. 1 2 Lightcurve plot of 706 Hirundo, Palmer Divide Observatory (PDO), B. Warner (2000). Rotation period 22.027±0.005 hours with a brightness amplitude of 0.9±0.03 mag. Quality code is 3. Summary figures at the LCDB and PDO websites.

    References

    1. 1 2 3 4 5 "706 Hirundo (A910 TF)". Minor Planet Center. Retrieved 16 June 2020.
    2. ↑ "hirundine" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
    3. 1 2 3 4 Schmadel, Lutz D. (2007). "(706) Hirundo". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 68. doi:10.1007/978-3-540-29925-7_707. ISBN   978-3-540-00238-3.
    4. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 706 Hirundo (A910 TF)" (2020-04-28 last obs.). Jet Propulsion Laboratory . Retrieved 16 June 2020.
    5. 1 2 "Asteroid 706 Hirundo – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 16 June 2020.
    6. 1 2 3 4 5 6 7 "Asteroid 706 Hirundo". Small Bodies Data Ferret. Retrieved 16 June 2020.
    7. 1 2 Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 16 June 2020.} (PDS main page)
    8. ↑ 'Our Chronicle', The Eagle, vol. XXVIII, 1907, p. 355
    9. 1 2 3 4 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T . Retrieved 16 June 2020.
    10. 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. (online, AcuA catalog p. 153)
    11. 1 2 3 4 Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System: EAR-A-COMPIL-5-NEOWISEDIAM-V1.0. Bibcode:2016PDSS..247.....M . Retrieved 16 June 2020.
    12. 1 2 Warner, B. (March 2001). "Asteroid Photometry at the Palmer Divide Observatory: Results for 706 Hirundo, 957 Camelia, and 1719 Jens" (PDF). Minor Planet Bulletin. 28 (1): 4–5. Bibcode:2001MPBu...28....4W. Archived from the original (PDF) on 13 February 2020. Retrieved 16 June 2020.
    13. ↑ DeMeo, Francesca E.; Binzel, Richard P.; Slivan, Stephen M.; Bus, Schelte J. (July 2009). "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF). Icarus. 202 (1): 160–180. Bibcode:2009Icar..202..160D. doi:10.1016/j.icarus.2009.02.005. Archived from the original on 17 March 2014. Retrieved 28 September 2020. (Catalog at PDS)
    14. ↑ Holliday, B. (June 2001). "Photometry of Asteroid 706 Hirundo, August and September 2000" (PDF). Minor Planet Bulletin. 28 (1): 22. Bibcode:2001MPBu...28...22H. Archived from the original (PDF) on 17 June 2020. Retrieved 16 June 2020.
    15. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (706) Hirundo". Geneva Observatory. Retrieved 16 June 2020.
    16. 1 2 3 "LCDB Data for (706) Hirundo". Asteroid Lightcurve Database (LCDB). Retrieved 16 June 2020.
    17. ↑ Hanuš, J.; Ďurech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics. 586: A108. arXiv: 1510.07422 . Bibcode:2016A&A...586A.108H. doi:10.1051/0004-6361/201527441. ISSN   0004-6361. S2CID   119112278.
    18. ↑ Ďurech, J.; Hanuš, J.; Oszkiewicz, D.; Vančo, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: A48. arXiv: 1601.02909 . Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. ISSN   0004-6361. S2CID   118427201.
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