سیارک ۲۰۲۳

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سیارک ۲۰۲۳ (به انگلیسی: 2023 Asaph، نامگذاری:1952SA) دو هزار و بیست و سومین سیارک کشف شده‌است[۱] که در ۱۶ سپتامبر ۱۹۵۲ کشف شد.[۲]

قدر مطلق سیارک برابر ۱۱٫۶۰ است.[۳]

منابع[ویرایش]

  1. طبق اینجا شماره سیارک معرف شماره کشف شدن آنهاست.
  2. «فهرست سیارک‌های شماره‌دار». دانشگاه هاروارد. دریافت‌شده در ۲۸ سپتامبر ۲۰۰۹.
  3. «فهرست داده‌های سیارک‌ها». ناسا. بایگانی‌شده از روی نسخه اصلی در ۱۳ مه ۲۰۱۹. دریافت‌شده در ۱۴ مه ۲۰۱۹.

پیوند به بیرون[ویرایش]


2023 Asaph
Discovery [1]
Discovered byIndiana University
(Indiana Asteroid Program)
Discovery siteGoethe Link Obs.
Discovery date16 September 1952
Designations
MPC designation(2023) Asaph
Named after
Asaph Hall
(American astronomer)[2]
1952 SA
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc64.53 yr (23,571 days)
Aphelion3.6816 AU
Perihelion2.0703 AU
2.8760 AU
Eccentricity0.2801
4.88 yr (1,781 days)
98.697°
0° 12m 7.56s / day
Inclination22.352°
3.1290°
357.53°
Physical characteristics
Dimensions19.678±0.264 km[4][5]
20.56±0.43 km[6]
21.29±0.40 km[7]
25.44 km (calculated)[3]
3.87±0.02 h[8][a]
4.74±0.01 h[9]
9.19±0.05 h[10]
0.057 (assumed)[3]
0.090±0.004[7]
0.096±0.018[6][5]
0.1045±0.0204[4]
C[3]
11.6[4][6][7] · 11.7[1][3]

2023 Asaph, provisional designation 1952 SA, is a dark asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter.[6] It was discovered on 16 September 1952, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States.[11]

Orbit and classification

Asaph orbits the Sun in the outer main-belt at a distance of 2.1–3.7 AU once every 4 years and 11 months (1,781 days). Its orbit has an eccentricity of 0.28 and an inclination of 22° with respect to the ecliptic.[1] The asteroid's observation arc begins with its official discovery observation Goethe Link.[11]

Physical characterization

In November 2001, a rotational lightcurve of Asaph was obtained from photometric observations by American astronomer Brian Warner. Lightcurve analysis gave a rotation period of 4.74 hours with a low brightness variation of 0.06 magnitude (U=2-).[9] Upon re-examination of the revised data set, Warner constructed a new, ambiguous lightcurve with two possible period solutions of 3.87 and 6.28 hours (U=2-).[8][a] These observations supersede a period of 9.19 hours derived from two fragmentary lightcurves obtained in 2001 and 2006, respectively (U=1/1).[10]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Asaph measures between 19.678 and 21.29 kilometers in diameter and its surface has an albedo between 0.09 and 0.1045.[4][5][6][7]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a larger diameter of 25.44 kilometers based on an absolute magnitude of 11.7.[3]

Naming

This minor planet was named in memory of American astronomer Asaph Hall (1829–1907), who discovered the Martian satellites, Phobos and Deimos.[2] The official naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4238).[12]

Notes

  1. ^ a b Lightcurve plot of 2023 Asaph, Palmer Divide Observatory, Brian Warner (2001). The lightcurve is ambiguous with two possible period solutions of 6.28±0.05 and 3.87±0.02 hours.

References

  1. ^ a b c d "JPL Small-Body Database Browser: 2023 Asaph (1952 SA)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 6 July 2017.
  2. ^ a b Schmadel, Lutz D. (2007). "(2023) Asaph". Dictionary of Minor Planet Names – (2023) Asaph. Springer Berlin Heidelberg. p. 164. doi:10.1007/978-3-540-29925-7_2024. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (2023) Asaph". Asteroid Lightcurve Database (LCDB). Retrieved 6 July 2017.
  4. ^ 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.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 6 July 2017.
  6. ^ a b c d e 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. Retrieved 6 July 2017.
  7. ^ 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. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
  8. ^ a b Warner, Brian D. (October 2010). "Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 37 (4): 150–151. Bibcode:2010MPBu...37..150W. ISSN 1052-8091. Retrieved 6 July 2017.
  9. ^ a b Warner, Brian D. (September 2003). "Lightcurve analysis of asteroids 331, 795, 886, 1266, 2023, 3285, and 3431". The Minor Planet Bulletin. 30 (3): 61–64. Bibcode:2003MPBu...30...61W. ISSN 1052-8091. Retrieved 6 July 2017.
  10. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2023) Asaph". Geneva Observatory. Retrieved 6 July 2017.
  11. ^ a b "2023 Asaph (1952 SA)". Minor Planet Center. Retrieved 6 July 2017.
  12. ^ Schmadel, Lutz D. "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.

External links