173 Ino

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173 Ino
173 Ino VLT (2021), deconvolved.pdf
Discovery [1]
Discovered by A. Borrelly
Discovery site Marseille
Discovery date1 August 1877
Designations
(173) Ino
Pronunciation /ˈaɪnoʊ/ EYE-noh [2]
Named after
 Ἰνώ Īnṓ [3] (Greek mythology)
A877 PA; 1922 SB
main-belt [1] [4]  ·(middle)
Ino [5]
Adjectives Inoan ( /aɪˈnoʊən/ eye-NOH-ən) [6]
Orbital characteristics [4]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 138.75 yr (50,678 d)
Aphelion 3.3142 AU
Perihelion 2.1708 AU
2.7425 AU
Eccentricity 0.2085
4.54 yr (1,659 d)
307.27°
0° 13m 1.2s / day
Inclination 14.197°
148.18°
228.89°
Physical characteristics
145±3 km [7]
119±27  km [8]
125.8±1.5 km [9]
148±42 km [10]
154.1±3.5 km [11]
160.6 km [12]
Flattening 0.24 [a]
Mass (2.2±1.3)×1018 kg [7]
(4.79±3.11)×1018  kg [13]
Mean density
1.4±0.8 g/cm3 [7]
2.23±1.47 g/cm3 [13]
5.93  h [14]
6.1±0.2 h [15]
6.106±0.001 h [15]
6.1088±0.0007 h [15]
6.11 h [16]
6.113±0.002 h [17]
6.11651 h [18]
6.15 h [19] [4]
6.163 h [20]
0.061 (calculated) [7]
0.059 [12]
0.06±0.02 [10]
0.0642±0.003 [11]
0.07±0.05 [8]
0.096±0.018 [9] [4]
Tholen = C [4]
SMASS = Xk [4]
B–V = 0.705 [4]
U–B = 0.305 [4]
7.66 [9] [10] [11] [12] [21]
7.99 [4]
7.80±0.05 [22]
7.90 [8] [23]

    173 Ino is a large asteroid and the parent body of the Ino family, located in the central regions of the asteroid belt, approximately 150 kilometers (93 miles) in diameter. It was discovered on 1 August 1877, by French astronomer Alphonse Borrelly at Marseille Observatory in southern France, and named after the queen Ino from Greek mythology. [1] [3] The dark Xk-type asteroid has a rotation period of 6.15 hours. [21]

    Contents

    Orbit and classification

    Ino is the parent body and namesake of the Ino family ( 522 ), [5] an asteroid family in the intermediate main belt with nearly 500 known members. [24] : 23  The adjectival form of the asteroid name is "Inoan".

    It orbits the Sun in the central main-belt at a distance of 2.2–3.3  AU once every 4 years and 6 months (1,659 days; semi-major axis of 2.74 AU). Its orbit has an eccentricity of 0.21 and an inclination of 14° with respect to the ecliptic. [4] The body's observation arc begins at Düsseldorf-Bilk Observatory in January 1879, five months after its official discovery observation at Marseilles. [1]

    Physical characteristics

    In the Tholen classification, Ino is a common carbonaceous C-type, while in the SMASS classification it is a Xk-subtype that transitions between the X-type and uncommon K-type asteroids. [4]

    Multiple photometric studies of this asteroid were performed between 1978 and 2002. The combined data gave an irregular, asymmetrical light curve with a period of 6.163 ± 0.005 hours and a brightness variation of 0.10–0.15 in magnitude. The asteroid is rotating in a retrograde direction. [18]

    Notes

    1. ↑ Flattening derived from the maximum aspect ratio (c/a): , where (c/a) = 0.76±0.06. [7]

    References

    1. 1 2 3 4 "173 Ino". Minor Planet Center. Retrieved 18 April 2018.
    2. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
    3. 1 2 Schmadel, Lutz D. (2007). "(173) Ino". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 30. doi:10.1007/978-3-540-29925-7_174. ISBN   978-3-540-00238-3.
    4. 1 2 3 4 5 6 7 8 9 10 11 "JPL Small-Body Database Browser: 173 Ino" (2017-10-21 last obs.). Jet Propulsion Laboratory . Retrieved 18 April 2018.
    5. 1 2 "Asteroid 173 Ino". Small Bodies Data Ferret. Retrieved 24 October 2019.
    6. ↑ George Stuart (1882) The Eclogues, Georgics, and Moretum of Virgil, p. 271
    7. 1 2 3 4 5 P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
    8. 1 2 3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv: 1606.08923 . Bibcode:2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63 .
    9. 1 2 3 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: 1209.5794 . Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8.
    10. 1 2 3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117.
    11. 1 2 3 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 22 October 2019.
    12. 1 2 3 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)
    13. 1 2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009 See Table 1.
    14. ↑ Schober, H. J. (December 1978). "Photometric Variations of the Minor Planets 55 Pandora and 173 Ino during the Opposition in 1977: Light Curves and Rotation Periods". Astronomy and Astrophysics Supplement. 34: 377. Bibcode:1978A&AS...34..377S . Retrieved 18 April 2018.
    15. 1 2 3 Behrend, Raoul. "Asteroids and comets rotation curves – (173) Ino". Geneva Observatory. Retrieved 18 April 2018.
    16. ↑ Erikson, A. (December 1989). "Improvement of Rotation Periods for the Asteroids 12 Victoria, 173 Ino and 1245 Calvinia". Asteroids: 55. Bibcode:1990acm..proc...55E . Retrieved 18 April 2018.
    17. ↑ Gandolfi, D.; Cigna, M.; Fulvio, D.; Blanco, C. (January 2009). "CCD and photon-counting photometric observations of asteroids carried out at Padova and Catania observatories". Planetary and Space Science. 57 (1): 1–9. arXiv: 0810.1560 . Bibcode:2009P&SS...57....1G. doi:10.1016/j.pss.2008.09.014.
    18. 1 2 Michalowski, T.; Kaasalainen, M.; Marciniak, A.; Denchev, P.; Kwiatkowski, T.; Kryszczynska, A.; et al. (November 2005). "Photometry and models of selected main belt asteroids. II. 173 Ino, 376 Geometria, and 451 Patientia". Astronomy and Astrophysics. 443 (1): 329–335. Bibcode:2005A&A...443..329M. doi: 10.1051/0004-6361:20053656 .
    19. ↑ Debehogne, H.; Lagerkvist, C.-I.; Magnusson, P.; Hahn, G. (December 1989). "Physical studies of asteroids XX - Photoelectric photometry of asteroids". Asteroids: 45. Bibcode:1990acm..proc...45D . Retrieved 18 April 2018.
    20. ↑ Michalowski, Tadeusz (December 1993). "Poles, shapes, senses of rotation, and sidereal periods of asteroids". Icarus. 106 (2): 563. Bibcode:1993Icar..106..563M. doi:10.1006/icar.1993.1193 . Retrieved 18 April 2018.
    21. 1 2 "LCDB Data for (173) Ino". Asteroid Lightcurve Database (LCDB). Retrieved 18 April 2018.
    22. ↑ Warner, Brian D. (December 2007). "Initial Results of a Dedicated H-G Project". The Minor Planet Bulletin. 34 (4): 113–119. Bibcode:2007MPBu...34..113W. ISSN   1052-8091 . Retrieved 18 April 2018.
    23. ↑ 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: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007.
    24. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv: 1502.01628 . Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN   9780816532131.
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