1081 Reseda

1081 Reseda

Modelled shape of Reseda from its lightcurve
Discovery[1]
Discovered by	K. Reinmuth
Discovery site	Heidelberg Obs.
Discovery date	31 August 1927
Designations
MPC designation	(1081) Reseda
Pronunciation	/rɪˈsiːdə/[2]
Named after	Resēda (mignonette) (herbaceous plant)[3]
Alternative designations	1927 QF · 1949 UA1 1975 LS
Minor planet category	main-belt[4][1] · (outer) background[5][6]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	89.85 yr (32,816 days)
Aphelion	3.5567 AU
Perihelion	2.6505 AU
Semi-major axis	3.1036 AU
Eccentricity	0.1460
Orbital period (sidereal)	5.47 yr (1,997 days)
Mean anomaly	167.25°
Mean motion	0° 10^m 49.08^s / day
Inclination	4.2029°
Longitude of ascending node	30.443°
Argument of perihelion	7.5205°
Physical characteristics
Dimensions	31.60±11.05 km[7] 35.66±0.70 km[8] 37.03±8.13 km[9] 37.810±0.219 km[10] 37.89±0.46 km[11] 37.97 km (derived)[12] 40.462±0.470 km[13]
Synodic rotation period	7.3002±0.0006 h[14] 7.30136±0.00001 h[15]
Pole ecliptic latitude	(92.0°, −69.0°) (λ1/β1)[6] (256.0°, −76.0°) (λ2/β2)[6]
Geometric albedo	0.0326±0.0026[13] 0.042±0.002[8] 0.043±0.006[10] 0.0488 (derived)[12] 0.049±0.008[11] 0.06±0.02[9] 0.09±0.07[7]
Spectral type	C (assumed)[12]
Absolute magnitude (H)	11.00[12][7][11] · 11.1[1] · 11.16[9] · 11.30[8][13]

1081 Reseda (prov. designation: 1927 QF) is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 31 August 1927, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[4] The asteroid has a rotation period of 7.3 hours and measures approximately 37 kilometers (23 miles) in diameter. It was named after the herbaceous plant Reseda.[3]

Orbit and classification

Reseda is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[5][6] It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.6 AU once every 5 years and 6 months (1,997 days; semi-major axis of 3.10 AU). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic.[1] The body's observation arc begins at Heidelberg in September 1927, or 26 days after its official discovery observation.[4]

Naming

This minor planet was named after the herbaceous plant Reseda (also known as "weld", "dyer's rocket" and "bastard rocket") a genus of Old World herbs of the mignonette family. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 102).[3]

Reinmuth's flowers

Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between (1009) and (1200). This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).[16]

Physical characteristics

Reseda is an assumed carbonaceous C-type asteroid.[12]

Rotation period

In August 2008, a rotational lightcurve of Reseda was obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period of 7.3002 hours with a brightness amplitude of 0.34 magnitude (U=3).[14]

Poles

A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database, gave a concurring period of 7.30136 hours, as well as two spin axis of (92.0°, −69.0°) and (256.0°, −76.0°) in ecliptic coordinates (λ, β).[15]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Reseda measures between 31.60 and 40.462 kilometers in diameter and its surface has an albedo between 0.0326 and 0.09.[7][8][9][10][11][13] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0488 and a diameter of 37.97 kilometers based on an absolute magnitude of 11.0.[12]

References

1. "JPL Small-Body Database Browser: 1081 Reseda (1927 QF)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 28 November 2017.
2. "reseda". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
3. Schmadel, Lutz D. (2007). "(1081) Reseda". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 92. doi:10.1007/978-3-540-29925-7_1082. ISBN 978-3-540-00238-3.
4. "1081 Reseda (1927 QF)". Minor Planet Center. Retrieved 28 November 2017.
5. "Asteroid 1081 Reseda – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 13 March 2020.
6. "Asteroid 1081 Reseda". Small Bodies Data Ferret. Retrieved 13 March 2020.
7. 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. S2CID 9341381.
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. (online, AcuA catalog p. 153)
9. 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.
10. 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. S2CID 119293330.
11. 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. S2CID 46350317.
12. "LCDB Data for (1081) Reseda". Asteroid Lightcurve Database (LCDB). Retrieved 28 November 2017.
13. 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. S2CID 35447010.
14. Yankov, Arten; Ditteon, Richard (January 2009). "Lightcurves and Periods for Asteroids 1081 Reseda 2117 Danmark, 2315 Czechoslovakia, 2871 Schober, 6392 Takashimizuno, and (6409) 1992 VC". The Minor Planet Bulletin. 36 (1): 3–4. Bibcode:2009MPBu...36....3Y. ISSN 1052-8091.
15. Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv:1601.02909. Bibcode:2016A&A...587A..48D. doi:10.1051/0004-6361/201527573. S2CID 118427201.
16. Schmadel, Lutz D. (2007). "(1054) Forsytia". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 90. doi:10.1007/978-3-540-29925-7_1055. ISBN 978-3-540-00238-3.

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1081 Reseda at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1081 Reseda at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters