1154 Astronomia

1154 Astronomia, provisional designation 1927 CB, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory on 8 February 1927.[14] The asteroid was named for the natural science of astronomy.

1154 Astronomia
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date8 February 1927
Designations
(1154) Astronomia
Pronunciation/æstroʊˈnoʊmiə/
Named after
astronomy [2]
(a natural science)
1927 CB · A911 RA
main-belt · (outer) [1][3]
background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc105.83 yr (38,656 days)
Aphelion3.6308 AU
Perihelion3.1511 AU
3.3910 AU
Eccentricity0.0707
6.24 yr (2,281 days)
22.461°
0° 9m 28.08s / day
Inclination4.5323°
82.512°
203.85°
Physical characteristics
Dimensions55.4±5.5 km[5]
55.715±0.500 km[6]
57.253±0.339 km[7]
59±6 km[8]
59.68±18.01 km[9]
60.10±16.38 km[10]
61.08 km (SIMPS)[3][11]
64.20±1.11 km[12]
18.1154±0.0139 h[lower-alpha 1]
0.028±0.001[12]
0.0296 (SIMPS)[3][11]
0.03±0.01[8]
0.03±0.02[9]
0.03±0.03[10]
0.0337±0.0060[7]
0.036±0.008[6]
0.04±0.01[5]
Tholen = FXU: [1][3]
B–V = 0.658 [1]
U–B = 0.229 [1]
10.46[10] · 10.51[1][3][5][7][8][9][12] · 10.80±0.10[13]

    Orbit and classification

    Astronomia is a background asteroid, that is, not a member of any known asteroid family.[4] It orbits the Sun in the outer main-belt at a distance of 3.2–3.6 AU once every 6 years and 3 months (2,281 days). Its orbit has an eccentricity of 0.07 and an inclination of 5° with respect to the ecliptic.[1]

    The asteroid was first identified as A911 RA at Heidelberg in September 1911. The body's observation arc begins the night after its official discovery observation at Heidelberg.[14]

    Physical characteristics

    In the Tholen classification, Astronomia has an ambiguous spectral type, closest to a carbonaceous F-type and somewhat similar to that of an X-type asteroid. Its spectrum has also been flagged as unusual and of poor quality (FXU:).[1]

    Rotation period

    In May 2016, the first rotational lightcurve of Astronomia was obtained from photometric observations. Lightcurve analysis gave a rotation period of 18.1154 hours with a brightness variation of 0.39 magnitude (U=3-).[lower-alpha 1]

    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, Astronomia measures between 55.4 and 64.20 kilometers in diameter and its surface has an albedo between 0.028 and 0.04.[5][6][7][8][9][10][12]

    The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.0296 and a diameter of 61.08 kilometers based on an absolute magnitude of 10.51.[3][11]

    Naming

    This minor planet was named after the natural science of astronomy, a study of celestial objects, observations and phenomena in the night sky. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108).[2]

    Notes
    1. Brincat (2017a) not yet indexed in ADS. Summary figures for (1154) Astronomia at Collaborative Asteroid Lightcurve Link (CALL)
    gollark: ARM is improving *really* fast.
    gollark: I mean, RISC-V is kind of good but I think more complex instructions might actually be a good idea, to keep the CPU execution bits happy and fed with stuff to do.
    gollark: What is "something good" though?
    gollark: TIS-100 assembly *is* an esolang.
    gollark: You could actually do this on top of Python, it lets you delete builtins and meddle with most operations.

    References
    1. "JPL Small-Body Database Browser: 1154 Astronomia (1927 CB)" (2017-07-04 last obs.). Jet Propulsion Laboratory. Retrieved 8 September 2017.
    2. Schmadel, Lutz D. (2007). "(1154) Astronomia". Dictionary of Minor Planet Names – (1154) Astronomia. Springer Berlin Heidelberg. p. 97. doi:10.1007/978-3-540-29925-7_1155. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1154) Astronomia". Asteroid Lightcurve Database (LCDB). Retrieved 8 September 2017.
    4. "Asteroid 1154 Astronomia – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 28 October 2019.
    5. Alí-Lagoa, V.; Licandro, J.; Gil-Hutton, R.; Cañ; ada-Assandri, M.; Delbo', M.; et al. (June 2016). "Differences between the Pallas collisional family and similarly sized B-type asteroids". Astronomy and Astrophysics. 591: 11. Bibcode:2016A&A...591A..14A. doi:10.1051/0004-6361/201527660. Retrieved 8 September 2017.
    6. 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 8 September 2017.
    7. 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.
    8. Alí-Lagoa, V.; de León, J.; Licandro, J.; Delbó, M.; Campins, H.; Pinilla-Alonso, N.; et al. (June 2013). "Physical properties of B-type asteroids from WISE data". Astronomy and Astrophysics. 554: 16. arXiv:1303.5487. Bibcode:2013A&A...554A..71A. doi:10.1051/0004-6361/201220680. Retrieved 8 September 2017.
    9. 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. Retrieved 8 September 2017.
    10. 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. Retrieved 8 September 2017.
    11. 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.
    12. 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)
    13. 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 8 September 2017.
    14. "1154 Astronomia (1927 CB)". Minor Planet Center. Retrieved 8 September 2017.

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