1628 Strobel

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1628 Strobel
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date11 September 1923
Designations
(1628) Strobel
Named after
Willi Strobel (astronomer) [2]
1923 OG ·1926 GY
1947 GC ·1949 QA2
1952 DV2 ·1957 CA
1960 WH
main-belt  ·(outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 93.11 yr (34,007 days)
Aphelion 3.2152 AU
Perihelion 2.8088 AU
3.0120 AU
Eccentricity 0.0675
5.23 yr (1,909 days)
244.38°
0° 11m 18.6s / day
Inclination 19.387°
181.19°
289.14°
Physical characteristics
Dimensions51.15±14.91 km [4]
53.147±0.793 km [5]
54.26±16.39 km [6]
56.58±0.68 km [7]
57.06 km (derived) [3]
57.12±1.7 km (IRAS:12) [8]
59.345±0.484 km [9]
9.52±0.01 h [10]
11.80 h [11]
0.047±0.010 [9]
0.05±0.03 [6]
0.0504 (derived) [3]
0.0532±0.003(IRAS:12) [8]
0.055±0.002 [7]
0.0581±0.0113 [5]
0.06±0.04 [4]
P [5]  · X [12]  · C [3]
B–V = 0.840 [1]
U–B = 0.320 [1]
10.02 [1] [6] [7] [8]  ·10.08 [3] [5] [11]  ·10.31±0.20 [12]  ·10.32 [4]

    1628 Strobel (provisional designation 1923 OG) is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter.

    Contents

    It was discovered on 11 September 1923, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after ARI-astronomer Willi Strobel. [2] [13]

    Classification and orbit

    Strobel orbits the Sun in the outer main-belt at a distance of 2.8–3.2  AU once every 5 years and 3 months (1,909 days). Its orbit has an eccentricity of 0.07 and an inclination of 19° with respect to the ecliptic. [1] Strobel's observation arc begins two nights after its official discovery observation at Heidelberg in 1923. [13]

    Physical characteristics

    Strobel is a carbonaceous C-type asteroid. It is also classified as a P-type by WISE and as an X-type asteroid by Pan-STARRS. [5] [12]

    Rotation period

    American astronomer Richard Binzel obtained the first rotational lightcurve of Strobel in May 1984. It gave a rotation period of 11.80 hours with a brightness amplitude of 0.22 magnitude ( U=2 ). [11] In May 2005, photometric observations by French amateur astronomer Laurent Bernasconi gave a shorter period of 9.52 hours and a brightness change of 0.20 magnitude ( U=2 ). [10]

    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, Strobel measures between 51.15 and 59.35 kilometers in diameter, and its surface has an albedo between 0.047 and 0.06. [4] [5] [6] [7] [8] [9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0504 and a diameter of 57.06 kilometers with an absolute magnitude of 10.08. [3]

    Naming

    This minor planet was named in honor of Willi Strobel (1909–1988), staff member at Astronomisches Rechen-Institut (ARI) since 1938, and author of the 1963-edition of Identifizierungsnachweis der Kleinen Planeten (Minor planet identifications, published by ARI). [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3931). [14]

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    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1628 Strobel (1923 OG)" (2016-10-19 last obs.). Jet Propulsion Laboratory . Retrieved 30 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1628) Strobel". Dictionary of Minor Planet Names – (1628) Strobel. Springer Berlin Heidelberg. p. 129. doi:10.1007/978-3-540-29925-7_1629. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (1628) Strobel". Asteroid Lightcurve Database (LCDB). Retrieved 27 December 2016.
    4. 1 2 3 4 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 .
    5. 1 2 3 4 5 6 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.
    6. 1 2 3 4 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 27 December 2016.
    7. 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". 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)
    8. 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 – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T . Retrieved 17 October 2019.
    9. 1 2 3 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 . Retrieved 27 December 2016.
    10. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1628) Strobel". Geneva Observatory . Retrieved 27 December 2016.
    11. 1 2 3 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus. 72 (1): 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN   0019-1035 . Retrieved 27 December 2016.
    12. 1 2 3 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 27 December 2016.
    13. 1 2 "1628 Strobel (1923 OG)". Minor Planet Center. Retrieved 27 December 2016.
    14. ↑ 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. Bibcode:2009dmpn.book.....S. doi:10.1007/978-3-642-01965-4. ISBN   978-3-642-01964-7.
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