Astronomy:1535 Päijänne

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Short description: Asteroid
1535 Päijänne
Discovery[1]
Discovered byY. Väisälä
Discovery siteTurku Obs.
Discovery date9 September 1939
Designations
(1535) Päijänne
Pronunciationpæi(j)ænːe
Named afterLake Päijänne (Finland)[2]
1939 RC · 1933 QE1
1944 OA · 1956 XB
1985 XE2 · A916 OB
Minor planet categorymain-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc83.77 yr (30,598 days)
|{{{apsis}}}|helion}}3.7718 AU
|{{{apsis}}}|helion}}2.5586 AU
3.1652 AU
Eccentricity0.1916
Orbital period5.63 yr (2,057 days)
Mean anomaly23.100°
Mean motion0° 10m 30s / day
Inclination6.0561°
Longitude of ascending node264.79°
39.922°
Physical characteristics
Dimensions23.836±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 period8.8448±0.0007 h[8]
Geometric albedo0.0638 (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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. ↑ 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. 
  11. ↑ 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



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