1469 Linzia

1469 Linzia, provisional designation 1938 QD, is a dark asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1938, the asteroid was later named after the Austrian city of Linz.

1469 Linzia
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date19 August 1938
Designations
(1469) Linzia
Pronunciation/ˈlɪntsiə/
Named after
Linz (Austrian city)[2]
1938 QD · 1931 JD
1933 SM1 · 1936 FC1
1949 OP1 · 1955 ST
1955 UB · A916 QD
main-belt · (outer)[3]
background[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc86.40 yr (31,556 days)
Aphelion3.3312 AU
Perihelion2.9148 AU
3.1230 AU
Eccentricity0.0667
5.52 yr (2,016 days)
52.444°
0° 10m 42.96s / day
Inclination13.398°
188.96°
207.33°
Physical characteristics
Dimensions54.30±16.67 km[5]
58.78 km (derived)[3]
58.99±2.5 km[6]
59.021±0.518 km[7]
66.05±21.19 km[8]
67.66±0.80 km[9]
74.78±0.36 km[10]
6.067 h (poor)[11]
12 h (poor)[12]
15.2±0.2 h[12]
22.215±0.004 h[13]
0.038±0.006[10]
0.056±0.002[9]
0.0561 (derived)[3]
0.06±0.04[5][8]
0.0733±0.0123[7]
0.0734±0.007[6]
P[7] · C (assumed)[3]
9.10±0.83[14] · 9.60[6][7][9] · 9.80[5][10] · 9.9[1][3] · 9.94[8]

    Discovery

    Linzia was discovered on 19 August 1938, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[15] Twelve nights later, the asteroid was independently discovered by Soviet astronomer Grigory Neujmin at the Simeiz Observatory, Crimea, on 31 August 1938.[2] The Minor Planet Center only recognizes the first discoverer.[15] The asteroid was first identified as A916 QD at Simeiz in August 1916, or 22 years prior to its official discovery.[15]

    Orbit and classification

    Linzia is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outer asteroid belt at a distance of 2.9–3.3 AU once every 5 years and 6 months (2,016 days). Its orbit has an eccentricity of 0.07 and an inclination of 13° with respect to the ecliptic.[1] The body's observation arc begins at the discovering Heidelberg Observatory in May 1931, when it was identified as 1931 JD.[15]

    Physical characteristics

    Linzia has been characterized as a dark and primitive P-type asteroid by the Wide-field Infrared Survey Explorer (WISE),[7] while the Lightcurve Data Base assumes it to be a carbonaceous C-type asteroid.[3]

    Rotation period

    In September 2010, a rotational lightcurve of Linzia was obtained from photometric observations by Robert Stephens in collaboration with Vladimir Benishek. Lightcurve analysis gave a slightly longer-than average rotation period of 22.215 hours with a brightness amplitude of 0.09 magnitude (U=3).[13] Other lightcurves which measured a period of 6.067, 12 and 15.2 hours, received a lower quality rating (U=1/1/2-).[11][12]

    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 WISE telescope, Linzia measures between 54.30 and 74.78 kilometers in diameter and its surface has an albedo between 0.038 and 0.0734.[5][6][7][8][9][10]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0561 and a diameter of 58.78 kilometers based on an absolute magnitude of 9.9.[3]

    Naming

    This minor planet was named in honor of the Austrian city of Linz, located on the Danube river. The name was proposed by A. Wersig (RI 2319), and the official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 132).[2]

    References
    1. "JPL Small-Body Database Browser: 1469 Linzia (1938 QD)" (2017-10-01 last obs.). Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 20 October 2017.
    2. Schmadel, Lutz D. (2007). "(1469) Linzia". Dictionary of Minor Planet Names – (1469) Linzia. Springer Berlin Heidelberg. p. 117. doi:10.1007/978-3-540-29925-7_1470. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1469) Linzia". Asteroid Lightcurve Database (LCDB). Retrieved 20 October 2017.
    4. "Asteroid 1469 Linzia – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    5. 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. Retrieved 20 October 2017.
    6. 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. Retrieved 22 October 2019.
    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. 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. Retrieved 20 October 2017.
    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. (online, AcuA catalog p. 153)
    10. 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 20 October 2017.
    11. Blanco, C.; Di Martino, M.; Riccioli, D. (April 2000). "New rotational periods of 18 asteroids". Planetary and Space Science. 48 (4): 271–284. Bibcode:2000P&SS...48..271B. doi:10.1016/S0032-0633(99)00074-4. Retrieved 20 October 2017.
    12. Behrend, Raoul. "Asteroids and comets rotation curves – (1469) Linzia". Geneva Observatory. Retrieved 20 October 2017.
    13. Stephens, Robert D.; Benishek, Vladimir (January 2011). "Lightcurve Analysis of 1469 Linzia". The Minor Planet Bulletin. 38 (1): 31–32. Bibcode:2011MPBu...38...31S. ISSN 1052-8091. Retrieved 20 October 2017.
    14. 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 20 October 2017.
    15. "1469 Linzia (1938 QD)". Minor Planet Center. Retrieved 20 October 2017.

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