Astronomy:1374 Isora
| Discovery[1] | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 21 October 1935 |
| Designations | |
| (1374) Isora | |
| Named after | Constructed female name ("Rosi" spelled backwards)[2] |
| 1935 UA | |
| Minor planet category | Mars-crosser[1][3][4] |
| Orbital characteristics[1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.05 yr (29,604 days) |
| |{{{apsis}}}|helion}} | 2.8775 AU |
| |{{{apsis}}}|helion}} | 1.6230 AU |
| 2.2502 AU | |
| Eccentricity | 0.2788 |
| Orbital period | 3.38 yr (1,233 days) |
| Mean anomaly | 44.987° |
| Mean motion | 0° 17m 31.2s / day |
| Inclination | 5.2943° |
| Longitude of ascending node | 302.56° |
| 60.988° | |
| Earth MOID | 0.6290 AU |
| Physical characteristics | |
| Dimensions | 5.48 km (derived)[4] |
| Rotation period | 8±2 h[5] 36.699±0.001 h[6] |
| Geometric albedo | 0.20 (assumed)[4] |
| SMASS = Sq[1] · S[4][7][8] | |
| Absolute magnitude (H) | 13.00[8] · 13.3[1] · 13.32±0.32[7] · 13.67±0.15[4][5] |
1374 Isora, provisional designation 1935 UA, is a stony asteroid and eccentric Mars-crosser from the innermost regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 21 October 1935, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium.[3]
Orbit and classification
In the SMASS taxonomy, Isora is classified as a Sq-type, an intermediary between the abundant S and rather rare Q-type asteroids. It orbits the Sun at a distance of 1.6–2.9 AU once every 3 years and 5 months (1,233 days). Its orbit has an eccentricity of 0.28 and an inclination of 5° with respect to the ecliptic.[1] Isora's observation arc begins with its official discovery observation at Uccle, as no precoveries were taken and no prior identifications were made.[3]
Physical characteristics
In January 2014, a rotational light-curve of Isora was obtained by American astronomer Robert D. Stephens at the Center for Solar System Studies (CS3) in California. Light-curve analysis gave a longer than average rotation period of 36.699 hours with a brightness variation of 0.12 magnitude ({{{1}}}). However, a second period solution of 18.35 hours is also possible.[6] The result supersedes photometric observations taken by Wiesław Z. Wiśniewski in 1989, which rendered a fragmentary light-curve with a period of 8 hours ({{{1}}}).[5]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 5.48 kilometers using an absolute magnitude of 13.67.[4]
Naming
Isora is the backwards spelled feminine name "Rosi" with an appended "a".[2] Naming was proposed by Gustav Stracke (1887–1943) – astronomer at the German Astronomisches Rechen-Institut, and after whom the minor planet 1019 Strackea is named – and first cited by Paul Herget in his The Names of the Minor Planets in 1955 (H 125).[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 1374 Isora (1935 UA)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001374. Retrieved 11 January 2017.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1374) Isora". Dictionary of Minor Planet Names – (1374) Isora. Springer Berlin Heidelberg. p. 111. doi:10.1007/978-3-540-29925-7_1375. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 "1374 Isora (1935 UA)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1374. Retrieved 11 January 2017.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 "LCDB Data for (1374) Isora". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1374%7CIsora. Retrieved 11 January 2017.
- ↑ 5.0 5.1 5.2 Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference 26: 1511. Bibcode: 1995LPI....26.1511W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995LPI....26.1511W. Retrieved 11 January 2017.
- ↑ 6.0 6.1 Stephens, Robert D. (July 2014). "Asteroids Observed from CS3: 2014 January - March". The Minor Planet Bulletin 41 (3): 171–175. ISSN 1052-8091. Bibcode: 2014MPBu...41..171S. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..171S. Retrieved 11 January 2017.
- ↑ 7.0 7.1 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 11 January 2017.
- ↑ 8.0 8.1 Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus 268: 340–354. doi:10.1016/j.icarus.2015.12.047. Bibcode: 2016Icar..268..340C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016Icar..268..340C. Retrieved 11 January 2017.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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
- 1374 Isora at AstDyS-2, Asteroids—Dynamic Site
- 1374 Isora at the JPL Small-Body Database
 |  |
