Astronomy:1535 Päijänne
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 9 September 1939 |
| Designations | |
| (1535) Päijänne | |
| Pronunciation | pæi(j)ænːe |
| Named after | Lake Päijänne (Finland)[2] |
| 1939 RC · 1933 QE1 1944 OA · 1956 XB 1985 XE2 · A916 OB | |
| Minor planet category | main-belt · (outer)[3] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.77 yr (30,598 days) |
| |{{{apsis}}}|helion}} | 3.7718 AU |
| |{{{apsis}}}|helion}} | 2.5586 AU |
| 3.1652 AU | |
| Eccentricity | 0.1916 |
| Orbital period | 5.63 yr (2,057 days) |
| Mean anomaly | 23.100° |
| Mean motion | 0° 10m 30s / day |
| Inclination | 6.0561° |
| Longitude of ascending node | 264.79° |
| 39.922° | |
| Physical characteristics | |
| Dimensions | 23.836±0.206 km[4] 25.518±0.187 km[5] 26.12±0.42 km[6] 26.36 km (derived)[3] 26.72±1.0 km[7] |
| Rotation period | 8.8448±0.0007 h[8] |
| Geometric albedo | 0.0638 (derived)[3] 0.1299±0.011[7] 0.140±0.005[6] 0.1430±0.0230[5] 0.164±0.031[4] |
| CX[9] · S[3] | |
| Absolute magnitude (H) | 10.7[5][6][7] · 11.44±0.09[9] · 11.5[1][3] |
1535 Päijänne (pæi(j)ænːe), provisional designation 1939 RC, is an asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 9 September 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland.[10] It was later named for Lake Päijänne.[2]
Orbit
Päijänne orbits the Sun in the outer main-belt at a distance of 2.6–3.8 AU once every 5 years and 8 months (2,057 days). Its orbit has an eccentricity of 0.19 and an inclination of 6° with respect to the ecliptic.[1] It was first identified as A916 OB at Simeiz Observatory in 1916. The body's observation arc begins 6 years prior to its official discovery with its identification as 1933 QE1 at Heidelberg Observatory.[10]
Physical characteristics
Päijänne is classified as both S-type and transitional CX-type asteroid.[3][9]
Lightcurves
In September 2006, a rotational lightcurve of Päijänne was obtained from photometric observations taken by French amateur astronomer Laurent Bernasconi. The lightcurve analysis gave a well-defined rotation period of 8.8448 hours with a change in brightness of 0.50 magnitude ({{{1}}}).[8]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Päijänne measures between 23.836 and 26.72 kilometers in diameter, and its surface has an albedo between 0.1299 and 0.164.[4][5][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0638 and a diameter of 26.36 kilometers with an absolute magnitude of 11.5.[3]
Naming
This minor planet was named for Finland's second largest lake, Päijänne, located in south-central Finland, and more than a thousand square kilometers in size.[2] The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929).[11]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1535 Paijanne (1939 RC)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001535. Retrieved 30 June 2017.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1535) Päijänne". Dictionary of Minor Planet Names – (1535) Päijänne. Springer Berlin Heidelberg. p. 122. doi:10.1007/978-3-540-29925-7_1536. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (1535) Päijänne". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1535%7CPäijänne. Retrieved 31 December 2016.
- ↑ 4.0 4.1 4.2 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 31 December 2016.
- ↑ 5.0 5.1 5.2 5.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
- ↑ 7.0 7.1 7.2 7.3 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019.
- ↑ 8.0 8.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1535) Päijänne". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001535. Retrieved 31 December 2016.
- ↑ 9.0 9.1 9.2 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 31 December 2016.
- ↑ 10.0 10.1 "1535 Paijanne (1939 RC)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1535. Retrieved 31 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. https://archive.org/details/dictionaryminorp2008schm.
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
- 1535 Päijänne at AstDyS-2, Asteroids—Dynamic Site
- 1535 Päijänne at the JPL Small-Body Database
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