1297 Quadea

1297 Quadea, provisional designation 1934 AD, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 7 January 1934, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany.[14] The asteroid was named for the parents-in-law of the discoverer's brother.[2]

1297 Quadea
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date7 January 1934
Designations
(1297) Quadea
Named after
Quadea (parents-in-law of the discoverer's brother)[2]
1934 AD · 1927 VB
1929 CA1 · 1929 EJ
main-belt · (outer)
Eos [3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc89.31 yr (32,619 days)
Aphelion3.2383 AU
Perihelion2.8024 AU
3.0203 AU
Eccentricity0.0722
5.25 yr (1,917 days)
30.780°
0° 11m 16.08s / day
Inclination9.0027°
295.94°
123.49°
Physical characteristics
Dimensions19.62±1.00 km[5]
22.420±0.255 km[6]
23.408±0.216 km[7]
23.47 km (calculated)[3]
24.77±0.49 km[8]
6.256±0.005 h[9]
6.267±0.001 h[10]
6.267±0.005 h[11][lower-alpha 1]
6.268±0.0012 h[12]
0.14 (assumed)[3]
0.142±0.007[8]
0.1551±0.0098[7]
0.200±0.033[5]
C [13] · S [3]
10.668±0.001 (R)[12] · 10.80[7][8] · 10.87±0.28[13] · 10.90[1][3][5]

    Orbit and classification

    Quadea is a member the Eos family (606),[4] the largest asteroid family in the outer main belt consisting of nearly 10,000 known asteroids.[15]:23 It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,917 days). Its orbit has an eccentricity of 0.07 and an inclination of 9° with respect to the ecliptic.[1]

    The body's observation arc begins more than six years prior to its official discovery observation with its first identification as 1927 VB at Heidelberg in November 1927.[14]

    Physical characteristics

    Quadea has been characterized as a carbonaceous C-type asteroid by PanSTARRS photometric survey.[13] The asteroid is also an assumed S-type asteroid,[3] while the overall spectral type for members of the Eos family is that of a K-type, with albedos in-between the S-and C-types.[15]:23

    Rotation period

    Since 2006, several rotational lightcurves of Quadea have obtained by astronomers Pierre Antonini and Brian Warner, as well as from photometric observations at the Palomar Transient Factory, California, and the Oakley Southern Sky Observatory (E09) in Australia. Analysis of the best-rated lightcurve gave a well-defined rotation period of 6.267 hours and a brightness variation of 0.35 magnitude (U=3/3/3/2).[9][10][11][12][lower-alpha 1]

    Diameter and albedo

    According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Quadea measures between 19.62 and 22.42 kilometers in diameter and its surface has an albedo between 0.1551 and 0.200,[5][6][7] while the Japanese Akari satellite found a diameter of 24.7 kilometers with an albedo of 0.142.[8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.14 and calculates a diameter of 23.47 kilometers based on an absolute magnitude of 10.9.[3]

    Naming

    This minor planet was named by the discoverer after the parents-in-law of his brother, E. Reinmuth. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 119).[2]

    Notes
    1. Lightcurve plot of (1297) Quadea by Brian D. Warner (2016) at PDS/CS3. Rotation period 6.267±0.005 hours with a brightness amplitude of 0.24 mag. Quality Code of 3. Summary figures at LCDB

    References
    1. "JPL Small-Body Database Browser: 1297 Quadea (1934 AD)" (2017-02-21 last obs.). Jet Propulsion Laboratory. Retrieved 14 September 2017.
    2. Schmadel, Lutz D. (2007). "(1297) Quadea". Dictionary of Minor Planet Names – (1297) Quadea. Springer Berlin Heidelberg. p. 106. doi:10.1007/978-3-540-29925-7_1298. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1297) Quadea". Asteroid Lightcurve Database (LCDB). Retrieved 14 September 2017.
    4. "Asteroid 1297 Quadea – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
    5. 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. Retrieved 14 September 2017.
    6. 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 14 September 2017.
    7. 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.
    8. 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 17 October 2019. (online, AcuA catalog p. 153)
    9. Oliver, Robert Lemke; Shipley, Heath; Ditteon, Richard (October 2008). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 March". The Minor Planet Bulletin. 35 (4): 149–150. Bibcode:2008MPBu...35..149O. ISSN 1052-8091. Retrieved 14 September 2017.
    10. Behrend, Raoul. "Asteroids and comets rotation curves – (1297) Quadea". Geneva Observatory. Retrieved 14 September 2017.
    11. Warner, Brian D. (April 2017). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 October-December". The Minor Planet Bulletin. 44 (2): 116–120. Bibcode:2017MPBu...44..116W. ISSN 1052-8091. Retrieved 14 September 2017.
    12. Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 14 September 2017.
    13. 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. Retrieved 14 September 2017.
    14. "1297 Quadea (1934 AD)". Minor Planet Center. Retrieved 14 September 2017.
    15. 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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