1741 Giclas
1741 Giclas (prov. designation: 1960 BC) is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 26 January 1960, by IU's Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States.[12] It is named for astronomer Henry L. Giclas.[2]
Shape model of Giclas from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 26 January 1960 |
| Designations | |
| (1741) Giclas | |
Named after | Henry Giclas (astronomer)[2] |
| 1960 BC · 1953 UY 1953 VH1 · 1953 XN 1963 YD | |
| main-belt · Koronis[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.20 yr (23,084 days) |
| Aphelion | 3.0879 AU |
| Perihelion | 2.6812 AU |
| 2.8846 AU | |
| Eccentricity | 0.0705 |
| 4.90 yr (1,789 days) | |
| 17.734° | |
| 0° 12m 4.32s / day | |
| Inclination | 2.8876° |
| 55.514° | |
| 338.82° | |
| Physical characteristics | |
| Dimensions | 12.501±0.245 km[4] 13.11±0.18 km[5] 13.60 km (calculated)[3] 15.06±1.04 km[6] |
| 2.92±0.02 h[7] 2.938±0.001 h[8][a] 2.943±0.001 h[9] 3.107±0.005 h[10] | |
| 0.24 (assumed)[3] 0.260±0.049[5] 0.265±0.039[6] 0.374±0.048 0.3742±0.0483[4] | |
| S[3] V–R = 0.456±0.015[9] | |
| 11.11±0.04 (R)[9] · 11.2[4][6] · 11.36±0.13[11] · 11.49[5] · 11.5[1][3] | |
Orbit and classification edit
The S-type asteroid is a member of the Koronis family, a group consisting of about 200 known bodies. It orbits the Sun in the outer main-belt at a distance of 2.7–3.1 AU once every 4 years and 11 months (1,789 days). Its orbit has an eccentricity of 0.07 and an inclination of 3° with respect to the ecliptic.[1] Its first used observation was taken at Goethe Link Observatory in 1953, extending the body's observation arc by 7 years prior to its official discovery observation.[12]
Physical characteristics edit
Rotation period edit
Between 2004 and 2014, several lightcurves[a] of Giclas gave a rotation period between 2.92 and 3.107 hours with an brightness variation between 0.10 and 0.15 magnitude (U=3-/3/3/2).[7][8][9][10]
Diameter and albedo edit
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Giclas measures 12.50 and 15.06 kilometers in diameter, and its surface has an albedo in the range of 0.260 to 0.374.[4][5][6]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and calculates a diameter of 13.60 kilometers with an absolute magnitude of 11.5.[3]
Naming edit
This minor planet was named in honour of American astronomer Henry Lee Giclas (1910–2007), longtime staff member of the Lowell Observatory in Flagstaff, Arizona, where he discovered 17 minor planets and the comet 84P/Giclas. Giclas responsibility included the programs of minor planet positions and stellar proper motions, using the 13-inch Lawrence Lowell Telescope.[2] The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3934).[13]
Notes edit
- ^ a b Lightcurve plot of 1741 Giclas taken at the Palmer Divide Observatory by B. D. Warner (2007)
References edit
- ^ a b c d "JPL Small-Body Database Browser: 1741 Giclas (1960 BC)" (2016-12-25 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017.
- ^ a b c Schmadel, Lutz D. (2007). "(1741) Giclas". Dictionary of Minor Planet Names – (1741) Giclas. Springer Berlin Heidelberg. p. 138. doi:10.1007/978-3-540-29925-7_1742. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (1741) Giclas". Asteroid Lightcurve Database (LCDB). Retrieved 20 December 2016.
- ^ a b c d 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.
- ^ a b c d 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 December 2016.
- ^ a b c d 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)
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1741) Giclas". Geneva Observatory. Retrieved 20 December 2016.
- ^ a b Warner, Brian D. (June 2008). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: September-December 2007". The Minor Planet Bulletin. 35 (2): 67–71. Bibcode:2008MPBu...35...67W. ISSN 1052-8091. Retrieved 20 December 2016.
- ^ a b c d Slivan, Stephen M.; Binzel, Richard P.; Boroumand, Shaida C.; Pan, Margaret W.; Simpson, Christine M.; Tanabe, James T.; et al. (May 2008). "Rotation rates in the Koronis family, complete to H≈11.2". Icarus. 195 (1): 226–276. Bibcode:2008Icar..195..226S. doi:10.1016/j.icarus.2007.11.019. Retrieved 20 December 2016.
- ^ a b Oey, Julian (January 2016). "Lightcurve Analysis of Asteroids from Blue Mountains Observatory in 2014". The Minor Planet Bulletin. 43 (1): 45–51. Bibcode:2016MPBu...43...45O. ISSN 1052-8091. Retrieved 20 December 2016.
- ^ 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 December 2016.
- ^ a b "1741 Giclas (1960 BC)". Minor Planet Center. Retrieved 20 December 2016.
- ^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.
External links edit
- Asteroid Lightcurve Database (LCDB), query form (info 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1741 Giclas at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 1741 Giclas at the JPL Small-Body Database