Astronomy:1047 Geisha

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1047 Geisha
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date17 November 1924
Designations
(1047) Geisha
Named afterThe Geisha[2]
(British musical)
1924 TE · 1932 BP
1941 YG · 1947 NC
1950 JF · 1974 HU2
A916 HB
Minor planet categorymain-belt · (inner)
Flora[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc92.63 yr (33,833 d)
|{{{apsis}}}|helion}}2.6723 AU
|{{{apsis}}}|helion}}1.8094 AU
2.2409 AU
Eccentricity0.1925
Orbital period3.35 yr (1,225 days)
Mean anomaly256.96°
Mean motion0° 17m 37.68s / day
Inclination5.6667°
Longitude of ascending node78.223°
300.39°
Physical characteristics
Dimensions9.96±2.15 km[5]
10.555±0.095 km[6]
10.729±0.112 km[7]
11.52 km (calculated)[3]
Rotation period25.62±0.02 h[8]
Geometric albedo0.24 (assumed)[3]
0.277±0.029[7]
0.2897±0.0802[6]
0.30±0.13[5]
Tholen = S[1] · S[3]
B–V = 0.913[1]
U–B = 0.541[1]
Absolute magnitude (H)11.86[1][3][6] · 12.20[5]


1047 Geisha, provisional designation 1924 TE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 17 November 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[9] The asteroid was named after the British musical The Geisha.[2]

Orbit and classification

Geisha is a member of the Flora family (402),[3][4] a giant asteroid family and the largest family of stony asteroids in the main-belt.[10]:23 It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,225 days; semi-major axis 2.24 AU). Its orbit has an eccentricity of 0.19 and an inclination of 6° with respect to the ecliptic.[1]

The asteroid was first observed as A916 HB at Heidelberg in April 1916. The body's observation arc begins with its official discovery observation in November 1924.[9]

Physical characteristics

In the Tholen classification, Geisha is stony S-type asteroid,[1] which is also the overall spectral type for members of the Flora family.[10]:23

Rotation period

In February 2006, a rotational lightcurve of Geisha was obtained from photometric observations by Italian amateur astronomer Laurent Bernasconi. Lightcurve analysis gave a somewhat longer-than-average rotation period of 25.62 hours with a brightness amplitude of 0.33 magnitude ({{{1}}}).[8]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Geisha measures between 9.96 and 10.729 kilometers in diameter and its surface has an albedo between 0.277 and 0.30.[5][6][7]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, namesake and parent body of the Flora family – and calculates a diameter of 11.52 kilometers based on an absolute magnitude of 11.86.[3]

Naming

This minor planet was named after the British musical The Geisha, a story of a tea house (1896). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 100).[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "JPL Small-Body Database Browser: 1047 Geisha (1924 TE)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001047. Retrieved 11 January 2018. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1047) Geisha. Springer Berlin Heidelberg. p. 89. ISBN 978-3-540-00238-3. https://books.google.com/books?id=aeAg1X7afOoC&dq=1047+Geisha&pg=PA89. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (1047) Geisha". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1047%7CGeisha. Retrieved 11 January 2018. 
  4. ↑ 4.0 4.1 "Asteroid 1047 Geisha – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1047+Geisha. Retrieved 24 October 2019. 
  5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N. 
  6. ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. 
  7. ↑ 7.0 7.1 7.2 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. 
  8. ↑ 8.0 8.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1047) Geisha". Geneva Observatory. http://obswww.unige.ch/~behrend/page3cou.html#001047. Retrieved 11 January 2018. 
  9. ↑ 9.0 9.1 "1047 Geisha (1924 TE)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1047. Retrieved 11 January 2018. 
  10. ↑ 10.0 10.1 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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