1535_Päijänne
1535 Päijänne
Asteroid
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]
| 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 | |
| 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) |
| Aphelion | 3.7718 AU |
| Perihelion | 2.5586 AU |
| 3.1652 AU | |
| Eccentricity | 0.1916 |
| 5.63 yr (2,057 days) | |
| 23.100° | |
| 0° 10m 30s / day | |
| Inclination | 6.0561° |
| 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] |
| 8.8448±0.0007 h[8] | |
| 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] | |
| 10.7[5][6][7] · 11.44±0.09[9] · 11.5[1][3] | |
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]
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 (U=3).[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]
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]
- "JPL Small-Body Database Browser: 1535 Paijanne (1939 RC)" (2017-06-06 last obs.). Jet Propulsion Laboratory. Retrieved 30 June 2017.
- 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.
- "LCDB Data for (1535) Päijänne". Asteroid Lightcurve Database (LCDB). Retrieved 31 December 2016.
- 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. Retrieved 31 December 2016.
- 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.
- 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)
- 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.
- Behrend, Raoul. "Asteroids and comets rotation curves – (1535) Päijänne". Geneva Observatory. Retrieved 31 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 31 December 2016.
- "1535 Paijanne (1939 RC)". Minor Planet Center. 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.
- Asteroid Lightcurve Database (LCDB), query form (info Archived 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
- 1535 Päijänne at AstDyS-2, Asteroids—Dynamic Site
- 1535 Päijänne at the JPL Small-Body Database
