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173 Ino

Topic: Astronomy

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173 Ino
VLT-SPHERE image of Ino
Discovery[1]
Discovered byA. Borrelly
Discovery siteMarseille
Discovery date1 August 1877
Designations
(173) Ino
Pronunciation/ˈaɪnoʊ/ EYE-noh[5]
Named afterἸνώ Īnṓ[2] (Greek mythology)
A877 PA; 1922 SB
Minor planet categorymain-belt[1][3] · (middle)
Ino[4]
AdjectivesInoan (/aɪˈnoʊən/ eye-NOH-ən)[6]
Orbital characteristics[3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc138.75 yr (50,678 d)
|{{{apsis}}}|helion}}3.3142 AU
|{{{apsis}}}|helion}}2.1708 AU
2.7425 AU
Eccentricity0.2085
Orbital period4.54 yr (1,659 d)
Mean anomaly307.27°
Mean motion0° 13m 1.2s / day
Inclination14.197°
Longitude of ascending node148.18°
228.89°
Physical characteristics
Mean diameter145±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]
Flattening0.24[lower-alpha 1]
Mass(2.2±1.3)×1018 kg[7]
(4.79±3.11)×1018 kg[13]
Mean density1.4±0.8 g/cm3[7]
2.23±1.47 g/cm3[13]
Rotation period5.93 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][3]
6.163 h[20]
Geometric albedo0.061 (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][3]
Tholen = C[3]
SMASS = Xk[3]
B–V = 0.705[3]
U–B = 0.305[3]
Absolute magnitude (H)7.66[9][10][11][12][21]
7.99[3]
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][2] The dark Xk-type asteroid has a rotation period of 6.15 hours.[21]

Orbit and classification

Ino is the parent body and namesake of the Ino family (522),[4] 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.[3] 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.[3]

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): f=1−ca, where (c/a) = 0.76±0.06.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 "173 Ino". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=173. Retrieved 18 April 2018. 
  2. ↑ 2.0 2.1 Schmadel, Lutz D. (2007). "(173) Ino". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. pp. 30. doi:10.1007/978-3-540-29925-7_174. ISBN 978-3-540-00238-3. 
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 "JPL Small-Body Database Browser: 173 Ino". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000173. Retrieved 18 April 2018. 
  4. ↑ 4.0 4.1 "Asteroid 173 Ino". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=173+Ino. Retrieved 24 October 2019. 
  5. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
  6. ↑ George Stuart (1882) The Eclogues, Georgics, and Moretum of Virgil, p. 271
  7. ↑ 7.0 7.1 7.2 7.3 7.4 P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
  8. ↑ 8.0 8.1 8.2 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. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N. 
  9. ↑ 9.0 9.1 9.2 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. 
  10. ↑ 10.0 10.1 10.2 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. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. 
  11. ↑ 11.0 11.1 11.2 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019. 
  12. ↑ 12.0 12.1 12.2 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  13. ↑ 13.0 13.1 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C  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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1978A&AS...34..377S. Retrieved 18 April 2018. 
  15. ↑ 15.0 15.1 15.2 Behrend, Raoul. "Asteroids and comets rotation curves – (173) Ino". Geneva Observatory. http://obswww.unige.ch/~behrend/page1cou.html#000173. 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. http://adsabs.harvard.edu/cgi-bin/bib_query?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. doi:10.1016/j.pss.2008.09.014. Bibcode: 2009P&SS...57....1G. 
  18. ↑ 18.0 18.1 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. doi:10.1051/0004-6361:20053656. Bibcode: 2005A&A...443..329M. 
  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. http://adsabs.harvard.edu/cgi-bin/bib_query?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. doi:10.1006/icar.1993.1193. Bibcode: 1993Icar..106..563M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1993Icar..106..563M. Retrieved 18 April 2018. 
  21. ↑ 21.0 21.1 Template:Cite LCDB
  22. ↑ Warner, Brian D. (December 2007). "Initial Results of a Dedicated H-G Project". The Minor Planet Bulletin 34 (4): 113–119. ISSN 1052-8091. Bibcode: 2007MPBu...34..113W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34..113W. 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. 
  24. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N. 



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