27 Euterpe
Lightcurve-based 3D-model of Euterpe
Discovery [1]
Discovered byJ. R. Hind
Discovery siteGeorge Bishop's Obs.
Discovery date8 November 1853
Designations
(27) Euterpe
Pronunciation/juːˈtɜːrpiː/[2]
Named after
Euterpe (Greek mythology)[3]
1945 KB
main-belt · (inner) [4]
Euterpe [5]
AdjectivesEuterpean /juːˈtɜːrpiən/[6]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc163.48 yr (59,711 days)
Aphelion2.7524 AU
Perihelion1.9401 AU
2.3463 AU
Eccentricity0.1731
3.59 yr (1,313 days)
170.66°
0° 16m 27.12s / day
Inclination1.5837°
94.789°
356.55°
Physical characteristics
Dimensions124 × 75 km (occultation)[1]
96 km[1]
96.9 km[7]
105.80±7.23 km[8]
109.79±1.54 km[9]
118 km[10]
118.000±22.30 km[11]
Mass(1.67±1.01)×1018 kg[8]
Mean density
2.69±1.71 g/cm3[8]
8.500 h[4]
10.377±0.008 h[12]
10.40193±0.00005 h[13]
10.404±0.001 h[4]
10.407±0.002 h[14]
10.4082±0.0001 h[15]
10.410±0.002 h[16][17][lower-alpha 1]
10.41 h[18]
0.20±0.03[19]
0.2011±0.0582[11]
0.215±0.033[20]
0.234±0.008[9]
0.298[7]
Tholen = S [1]
SMASS = S [1] · S [21][4]
B–V = 0.878[1]
U–B = 0.502[1]
7.00[1][4][7][9][11] · 7.01±0.02[15]
0.13" to 0.035"

    Euterpe, minor planet designation 27 Euterpe, is a stony asteroid and parent body of the Euterpe family, located in the inner asteroid belt, approximately 100 kilometers in diameter. It was discovered by English astronomer John Russell Hind at George Bishop's Observatory in London on 8 November 1853. The asteroid was named after Euterpe, the Muse of music in Greek mythology.[3][22]

    Euterpe is one of the brightest asteroids in the night sky.[23] It had an apparent magnitude of 8.5 during a perihelic opposition on 25 December 2015 when the asteroid was about 1 AU from Earth.[24] At the end of November 2022 it passed about 1.5 degrees from Uranus while in the constellation of Aries.[25] Based on the S-type spectra the composition appears stony. It has a cross-section size of around 100–120 km. 27 Euterpe is orbiting the Sun with a period of 3.59 years and is spinning on its axis once every 10.4 hours.

    It is the parent body of the Euterpe family (410), a stony inner-belt asteroid family of nearly 400 known members.[5][26]: 23  Euterpe has been studied by radar.[27]

    Notes

    1. ↑ Lightcurve plot of 27 Euterpe, R. D. Stephens (lead) and B. D. Warner at the Palmer Divide Observatory (2000): rotation period 10.410±0.002 hours with a brightness amplitude of 0.21±0.01 mag. Summary figures at the LCDB

    References

    1. 1 2 3 4 5 6 7 8 9 "JPL Small-Body Database Browser: 27 Euterpe" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 21 December 2017.
    2. ↑ "Euterpe". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    3. 1 2 Schmadel, Lutz D. (2007). "(27) Euterpe". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 18. doi:10.1007/978-3-540-29925-7_28. ISBN 978-3-540-00238-3.
    4. 1 2 3 4 5 "LCDB Data for (27) Euterpe". Asteroid Lightcurve Database (LCDB). Retrieved 21 December 2017.
    5. 1 2 "Asteroid 27 Euterpe". Small Bodies Data Ferret. Retrieved 24 October 2019.
    6. ↑ "Euterpean". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    7. 1 2 3 Shevchenko, Vasilij G.; Tedesco, Edward F. (September 2006). "Asteroid albedos deduced from stellar occultations". Icarus. 184 (1): 211–220. Bibcode:2006Icar..184..211S. doi:10.1016/j.icarus.2006.04.006. Retrieved 21 December 2017.
    8. 1 2 3 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.
    9. 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)
    10. ↑ Morrison, D.; Zellner, B. (December 1978). "Polarimetry and radiometry of the asteroids". In: Asteroids. (A80-24551 08-91) Tucson: 1090–1097. Bibcode:1979aste.book.1090M. Retrieved 21 December 2017.
    11. 1 2 3 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    12. ↑ 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. Retrieved 21 December 2017.
    13. ↑ Hanus, J.; Durech, 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: 24. arXiv:1510.07422. Bibcode:2016A&A...586A.108H. doi:10.1051/0004-6361/201527441.
    14. ↑ Pilcher, Frederick (January 2011). "Rotation Period Determinations for 27 Euterpe, 296 Phaetusa and 672 Astarte, and a Note on 65 Cybele". The Minor Planet Bulletin. 38 (1): 50–52. Bibcode:2011MPBu...38...50P. ISSN 1052-8091. Retrieved 21 December 2017.
    15. 1 2 Stephens, Robert D.; Warner, Brian D.; Megna, Ralph; Coley, Daniel (January 2012). "A Shape Model of the Main-belt Asteroid 27 Euterpe". The Minor Planet Bulletin. 39 (1): 2–5. Bibcode:2012MPBu...39....2S. ISSN 1052-8091. Retrieved 21 December 2017.
    16. ↑ Stephens, R. D.; Malcolm, G.; Koff, R. A.; Brincat, S. M.; Warner, B. (March 2001). "New Period Determination for 27 Euterpe, a Collaborative Project". The Minor Planet Bulletin. 28: 1–2. Bibcode:2001MPBu...28....1S. Retrieved 21 December 2017.
    17. ↑ Stephens, R. D. (March 2001). "Combining Collaborative Work". The Minor Planet Bulletin. 28: 5–6. Bibcode:2001MPBu...28....5S. Retrieved 21 December 2017.
    18. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (27) Euterpe". Geneva Observatory. Retrieved 21 December 2017.
    19. ↑ Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Wright, E.; Cutri, R. M.; et al. (August 2011). "Thermal Model Calibration for Minor Planets Observed with Wide-field Infrared Survey Explorer/NEOWISE". The Astrophysical Journal. 736 (2): 9. Bibcode:2011ApJ...736..100M. CiteSeerX 10.1.1.472.4936. doi:10.1088/0004-637X/736/2/100. Retrieved 21 December 2017.
    20. ↑ Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 21 December 2017.
    21. ↑ Belskaya, I. N.; Fornasier, S.; Tozzi, G. P.; Gil-Hutton, R.; Cellino, A.; Antonyuk, K.; et al. (March 2017). "Refining the asteroid taxonomy by polarimetric observations". Icarus. 284: 30–42. Bibcode:2017Icar..284...30B. doi:10.1016/j.icarus.2016.11.003. Retrieved 4 November 2017.
    22. ↑ "27 Euterpe". Minor Planet Center. Retrieved 21 December 2017.
    23. ↑ "Bright Minor Planets 2004". Minor Planet Center. Retrieved 20 May 2008.
    24. ↑ "Horizons Online Ephemeris System for December 2015". California Institute of Technology, Jet Propulsion Laboratory. Retrieved 20 May 2008.
    25. ↑ "Finder chart for 27 with Uranus". In-the-Sky.org (Guides to the night sky). Archived from the original on 14 November 2022. Retrieved 13 November 2022.
    26. ↑ 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.
    27. ↑ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 30 October 2011.
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