سیارک ۲۰۳۱

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سیارک ۲۰۳۱
اکتشاف
تاریخ کشف اکتبر ۸, ۱۹۶۹
مبدا مه ۱۴, ۲۰۰۸
خروج از مرکز ۰.۱۷۳۲۷۱۶
آنومالی متوسط ۲۰۰.۴۶۲۶۶
زاویه انحراف ۴.۷۴۸۶۵
اوج ۲.۶۲۰۶۷۶۸
حضیض ۱.۸۴۶۶۲۱۰
تناوب مداری ۱۲۱۹.۳۲۸۶۳۴۹

سیارک ۲۰۳۱ (به انگلیسی: 2031 BAM، نامگذاری:1969TG2) دو هزار و سی و یکمین سیارک کشف شده‌است[۱] که در ۸ اکتبر ۱۹۶۹ کشف شد.[۲]

قدر مطلق سیارک برابر ۱۳٫۰۰ 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 اصلی در ۱۴ مه ۲۰۱۹. دریافت‌شده در ۱۴ مه ۲۰۱۹.

پیوند به بیرون[ویرایش]


2031 BAM
Orbit of 2031 BAM.gif
Orbital diagram of BAM
Discovery [1]
Discovered byL. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date8 October 1969
Designations
MPC designation(2031) BAM
Named after
Baikal–Amur Mainline[2]
(Siberian railway line)
1969 TG2 · 1939 VB
1959 TW · 1972 NQ
main-belt · (inner)
Flora[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc77.39 yr (28,268 days)
Aphelion2.6203 AU
Perihelion1.8477 AU
2.2340 AU
Eccentricity0.1729
3.34 yr (1,220 days)
124.02°
0° 17m 42.72s / day
Inclination4.7524°
169.28°
213.58°
Physical characteristics
Dimensions7.14 km (calculated)[3]
8.14±0.36 km[5]
10.774±0.004 h[6]
0.170±0.017[5]
0.24 (assumed)[3]
S[3][7]
12.9[1][3] · 13.00[5] · 13.05±0.81[7]

2031 BAM, provisional designation 1969 TG2, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 8 October 1969, by Soviet astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[8] The asteroid was named for those who built the Baikal–Amur Mainline (BAM; БАМ), a Siberian railway line.[2]

Orbit and classification

BAM is a member of the Flora family (402),[3][4] a giant asteroid family and the largest family of stony asteroids in the main belt.[9]:23 It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,220 days; semi-major axis of 2.23 AU). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[1]

The body's observation arc begins with its identification as 1939 VB at Uccle Observatory in November 1939, almost 30 years prior to its official discovery observation at Nauchnyj.[8]

Physical characteristics

BAM has been characterized as a stony S-type asteroid by Pan-STARRS photometric survey.[7]

Rotation period

In October 2016, a rotational lightcurve of BAM was obtained from photometric observations by amateur astronomer Matthieu Conjat. Lightcurve analysis gave a well-defined rotation period of 10.774 hours with a brightness amplitude of 0.15 magnitude (U=3).[6]

Diameter and albedo

According to the survey carried out by the Japanese Akari satellite, BAM measures 8.14 kilometers in diameter and its surface has an albedo of 0.170.[5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family – and calculates a diameter of 7.14 kilometers based on an absolute magnitude of 12.9.[3]

Naming

This minor planet was named after those who constructed the Baikal–Amur Mainline (BAM; БАМ) through eastern Russia from 1974 to 1986. The rail line opened in 1989, and runs between Ust-Kut (near Lake Baikal and Komsomolsk-on-Amur.[2][10] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4482).[11]

References

  1. ^ a b c d "JPL Small-Body Database Browser: 2031 BAM (1969 TG2)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 5 December 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(2031) Bam". Dictionary of Minor Planet Names – (2031) BAM. Springer Berlin Heidelberg. p. 164. doi:10.1007/978-3-540-29925-7_2032. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (2031) BAM". Asteroid Lightcurve Database (LCDB). Retrieved 5 December 2017.
  4. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 5 December 2017.
  5. ^ 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 5 December 2017.
  6. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2031) BAM". Geneva Observatory. Retrieved 5 December 2017.
  7. ^ a b c 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 5 December 2017.
  8. ^ a b "2031 BAM (1969 TG2)". Minor Planet Center. Retrieved 5 December 2017.
  9. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
  10. ^ "BAM". Mark Andrew Holmes' Personal Web Page. Retrieved 5 December 2017.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 December 2017.

External links