Asteroid
La Paz (minor planet designation : 1008 La Paz ), provisional designation 1923 PD , is a carbonaceous asteroid from the outer region of the asteroid belt , approximately 40 kilometers in diameter. It was discovered on 31 October 1923, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory and named after the city La Paz in Bolivia.[ 2] [ 13]
Orbit and classification
La Paz is a background asteroid as it does not belong to any known asteroid family . It orbits the Sun in the outer main-belt at a distance of 2.8–3.3 AU once every 5 years and 5 months (1,985 days). Its orbit has an eccentricity of 0.08 and an inclination of 9° with respect to the ecliptic .[ 1] observation arc begins at Heidelberg, 10 days after its official discovery observation.[ 13]
Physical characteristics
La Paz is an assumed carbonaceous C-type asteroid .[ 3]
Lightcurves
In November 2005, a rotational lightcurve of La Paz was obtained from photometric observations by French amateur astronomer René Roy . Lightcurve analysis gave a well-defined rotation period of 8.998 hours with a brightness amplitude of 0.14 magnitude (U=3 [ 11] U=3- A12 [ 11]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS , the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer , La Paz measures between 38.64 and 50.50 kilometers in diameter and its surface has an albedo between 0.04 and 0.099.[ 4] [ 5] [ 6] [ 7] [ 8] [ 9] [ 10]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0684 and a diameter of 38.54 kilometers based on an absolute magnitude of 10.6.[ 3]
Naming
This minor planet was named after La Paz , the capital city of Bolivia in South America. The official naming citation was mentioned in The Names of the Minor Planets Paul Herget in 1955 (H 96 [ 2]
References
^ a b c d "JPL Small-Body Database Browser: 1008 La Paz (1923 PD)" (2017-03-29 last obs.). Jet Propulsion Laboratory . Retrieved 29 August 2017 .^ a b c Schmadel, Lutz D. (2007). "(1008) la Paz". Dictionary of Minor Planet Names – (1008) La Paz . Springer Berlin Heidelberg . p. 87. doi :10.1007/978-3-540-29925-7_1009 . ISBN 978-3-540-00238-3 ^ a b c d e f g "LCDB Data for (1008) La Paz" . Asteroid Lightcurve Database (LCDB). Retrieved 29 August 2017 .^ a b c d 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 . ^ 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 . S2CID 46350317 . Retrieved 29 August 2017 . ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos" . The Astronomical Journal . 152 (3): 12. arXiv :1606.08923 Bibcode :2016AJ....152...63N . doi :10.3847/0004-6256/152/3/63 ^ a b c 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 . S2CID 119293330 . Retrieved 29 August 2017 . ^ 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 . S2CID 35447010 . ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos" . The Astrophysical Journal . 814 (2): 13. arXiv :1509.02522 Bibcode :2015ApJ...814..117N . doi :10.1088/0004-637X/814/2/117 . S2CID 9341381 . Retrieved 29 August 2017 . ^ 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 c d Behrend, Raoul. "Asteroids and comets rotation curves – (1008) La Paz" . Geneva Observatory . Retrieved 29 August 2017 . ^ 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 . S2CID 53493339 . Retrieved 29 August 2017 . ^ a b "1008 La Paz (1923 PD)" . Minor Planet Center . Retrieved 29 August 2017 .
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