606 Brangäne

606 Brangäne, provisional designation 1906 VB, is an asteroid from the central regions of the asteroid belt, approximately 36 kilometers (22 miles) in diameter. It was discovered on 18 September 1906, by astronomer August Kopff at the Heidelberg Observatory in southwest Germany.[1] The unusual K-type asteroid is the namesake of the small Brangäne family and has a rotation period of 12.3 hours.[10] It was named after Brangaine, a character from the opera Tristan und Isolde by Richard Wagner.[2]

606 Brangäne
Discovery [1]
Discovered byA. Kopff
Discovery siteHeidelberg Obs.
Discovery date18 September 1906
Designations
(606) Brangäne
PronunciationGerman: [ˈbʁaŋɡɛːnə]
Named after
Brangaine [2]
(opera character)
1906 VB
main-belt [1][3] · (middle)
Brangäne [4]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc111.68 yr (40,792 d)
Aphelion3.1564 AU
Perihelion2.0181 AU
2.5872 AU
Eccentricity0.2200
4.16 yr (1,520 d)
276.59°
0° 14m 12.48s / day
Inclination8.5990°
318.48°
58.344°
Physical characteristics
Mean diameter
28.15±4.91 km[5]
35.54±2.2 km[6]
35.758±0.165 km[7][8]
36.18±0.53 km[9]
12.2950±0.0001 h[10][11]
0.096[7][9]
0.096±0.009[8]
0.0986[6]
0.13[5][12]
Tholen = TSD [3]
SMASS = K [3][10]
B–V = 0.770[3]
U–B = 0.391[3]
10.20[10][12]
10.3[1][3]
10.38[6][7][9]
10.49[5]

    Orbit and classification

    Brangäne is the principal body of the stony Brangäne family,[4][13] a small asteroid family of less than 200 known members.[14] It orbits the Sun in the central main-belt at a distance of 2.0–3.2 AU once every 4 years and 2 months (1,520 days; semi-major axis of 2.59 AU). Its orbit has an eccentricity of 0.22 and an inclination of 9° with respect to the ecliptic.[3]

    Physical characteristics

    In the SMASS classification, Brangäne is an uncommon K-type asteroid,[3] while in the Tholen classification its spectral type is ambiguous, closest to a T-type and somewhat similar to that of an S- and D-type.[3]

    Rotation period

    In November 2006, a rotational lightcurve of Brangäne was obtained from photometric observations by French amateur astronomers Raymond Poncy and René Roy. Lightcurve analysis gave a rotation period of 12.2950±0.0001 hours with a brightness amplitude of 0.20 magnitude (U=3-).[10][11]

    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, Brangäne measures between 28.15 and 36.18 kilometers in diameter and its surface has an albedo between 0.096 and 0.13.[5][6][7][8][9] The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.1075 and a diameter of 36.96 kilometers, based on an absolute magnitude of 10.2, from Petr Pravec's revised WISE-data.[10]

    Naming

    This minor planet was named after Brangaine, a character from the opera Tristan und Isolde by Richard Wagner. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 64).[2]

    References
    1. "606 Brangane (1906 VB)". Minor Planet Center. Retrieved 12 July 2018.
    2. Schmadel, Lutz D. (2007). "(606) Brangäne". Dictionary of Minor Planet Names – (606) Brangäne. Springer Berlin Heidelberg. p. 62. doi:10.1007/978-3-540-29925-7_607. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 606 Brangane (1906 VB)" (2018-05-25 last obs.). Jet Propulsion Laboratory. Retrieved 12 July 2018.
    4. "Asteroid 606 Brangane". Small Bodies Data Ferret. Retrieved 12 July 2018.
    5. 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.
    6. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 12 July 2018.
    7. 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 12 July 2018.
    8. 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.
    9. 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. Retrieved 12 July 2018. (online, AcuA catalog p. 153)
    10. "LCDB Data for (606) Brangäne". Asteroid Lightcurve Database (LCDB). Retrieved 12 July 2018.
    11. Behrend, Raoul. "Asteroids and comets rotation curves – (606) Brangäne". Geneva Observatory. Retrieved 12 July 2018.
    12. 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.
    13. "Asteroid (606) Brangane – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 May 2018.
    14. 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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