1747 Wright

1747 Wright

3D light-curve model of 1747 Wright
Discovery [1]
Discovered by C. A. Wirtanen
Discovery site Lick Obs.
Discovery date 14 July 1947
Designations
MPC designation 1747 Wright
Named after
 William Wright
(observatory's director) [2]
1947 NH
Mars-crosser [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 68.88 yr (25,159 days)
Aphelion 1.8976 AU
Perihelion 1.5207 AU
1.7091 AU
Eccentricity 0.1103
2.23 yr (816 days)
358.25°
0° 26m 27.96s / day
Inclination 21.415°
268.39°
340.37°
Earth MOID 0.5113 AU
Physical characteristics
Dimensions 5.17±0.24 km [4]
6.35±0.6 km (IRAS:2)[5]
5.28796±0.00005 h[6]
5.2896±0.0002 h[7][8]
5.290±0.001 h[9]
0.2005±0.043 (IRAS:2)[5]
0.321±0.034 [4]
AU: (Tholen) [1]
Sl (SMASS) [1]
S [3]
13.35[1][3][4][5]

    1747 Wright, provisional designation 1947 NH, is a stony asteroid and a sizable Mars-crosser, approximately 6 kilometers in diameter. It was discovered on 14 July 1947, by American astronomer Carl Wirtanen at Lick Observatory on Mount Hamilton near San Jose, California.[10]

    The S-type asteroid is classified as an AU and Sl-type in the respective Tholen and SMASS classification scheme. It orbits the Sun at a distance of 1.5–1.9 AU once every 2 years and 3 months (816 days). Its orbit has an eccentricity of 0.11 and an inclination of 21° with respect to the ecliptic.[1] As no precoveries were taken, Wright's observation arc begins with its discovery observation in 1947.[10]

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, the asteroid measures 5.17 and 6.35 kilometers in diameter and its surface has an albedo of 0.20 and 0.32, respectively.[4][5] The Collaborative Asteroid Lightcurve Link agrees with the results obtained by IRAS.[3]

    In July 2005, a rotational light-curve for this asteroid was obtained by astronomers Reiner Stoss, Jaime Nomen, Salvador Sánchez and Raoul Behrend at the Mallorca Observatory, Spain. It gave a well-defined rotation period of 5.2896±0.0002 hours with a brightness variation of 0.61 magnitude (U=3).[7][8] In July 2014, another, concurring light-curve with a period of 5.28796±0.00005 hours and an amplitude of 0.53 was obtained by Robert D. Stephens at the Center for Solar System Studies (CS3, U81) in Landers, southern California.[9]

    The minor planet was named in memory of American astronomer William Hammond Wright (1871–1959), staff member and later director of the Lick Observatory until 1942. A pioneer in astrophysics, his large, wide-field 20-inch Carnegie double astrograph built for the observatory's proper motion survey (first light in 1941), was using distant galaxies ("spiral nebulae") as object references. During this survey, many comets and asteroids were discovered as a by-product.[2][11] He is also honored by the Martian and lunar craters Wright.[2] Naming citation was published before November 1977 (M.P.C. 3934).[12]

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1747 Wright (1947 NH)" (2016-05-31 last obs.). Jet Propulsion Laboratory. Retrieved 29 October 2016.
    2. 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1747) Wright. Springer Berlin Heidelberg. p. 139. ISBN 978-3-540-00238-3. Retrieved 29 October 2016.
    3. 1 2 3 4 "LCDB Data for (1747) Wright". Asteroid Lightcurve Database (LCDB). Retrieved 29 October 2016.
    4. 1 2 3 4 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" (PDF). Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 29 October 2016.
    5. 1 2 3 4 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 29 October 2016.
    6. ↑ Hanus, J.; Durech, J.; Broz, M.; Warner, B. D.; Pilcher, F.; Stephens, R.; et al. (June 2011). "A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method". Astronomy & Astrophysics. 530: 16. arXiv:1104.4114Freely accessible. Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738. Retrieved 18 November 2015.
    7. 1 2 Stoss, Reiner; Nomen, Jaime; Sanchez, Salvador; Behrend, Raoul (June 2006). "Lightcurve of minor planet 1747 Wright". The Minor Planet Bulletin. 33 (2): 33. Bibcode:2006MPBu...33...33S. ISSN 1052-8091. Retrieved 18 November 2015.
    8. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1747) Wright". Geneva Observatory. Retrieved 29 October 2016.
    9. 1 2 Stephens, Robert D. (January 2015). "Asteroids Observed from CS3: 2014 July - September". The Minor Planet Bulletin. 42 (1): 70–74. Bibcode:2015MPBu...42...70S. ISSN 1052-8091. Retrieved 18 November 2015.
    10. 1 2 "1747 Wright (1947 NH)". Minor Planet Center. Retrieved 29 October 2016.
    11. ↑ "Carnegie Double Astrograph". Lick Observatory. Retrieved 29 October 2016.
    12. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 October 2016.

    External links

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