Astronomy:1175 Margo

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1175 Margo
001175-asteroid shape model (1175) Margo.png
Modelled shape of Margo from its lightcurve
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date17 October 1930
Designations
(1175) Margo
Named afterunknown[2]
1930 UD · 1953 VK
1957 KU · A907 VA
Minor planet categorymain-belt · (outer)[1][3]
background[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc109.91 yr (40,146 days)
|{{{apsis}}}|helion}}3.4345 AU
|{{{apsis}}}|helion}}2.9979 AU
3.2162 AU
Eccentricity0.0679
Orbital period5.77 yr (2,107 days)
Mean anomaly61.257°
Mean motion0° 10m 15.24s / day
Inclination16.307°
Longitude of ascending node237.19°
102.79°
Physical characteristics
Dimensions22.99±0.85 km[5]
24.266±0.276 km[6]
25.394±0.250 km[7]
58.29 km (calculated)[3]
Rotation period6.01±0.02 h[8]
6.01±0.03 h[9]
6.0136±0.0002 h[9]
6.01375±0.00005 h[10]
6.015±0.001 h[11]
6.017±0.001 h[12]
11.99±0.03 h[13]
Geometric albedo0.057 (assumed)[3]
0.2409±0.0329[7]
0.249±0.042[6]
0.302±0.026[5]
S[14] · C (assumed)[3]
Absolute magnitude (H)9.9[3] · 10.0[1] · 10.06±0.23[14] · 10.20[5][7]


1175 Margo, provisional designation 1930 UD, is a stony background asteroid from the outermost regions of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 17 October 1930, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[15] The meaning of the asteroids's name is unknown.[2]

Orbit and classification

Margo is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outermost asteroid belt at a distance of 3.0–3.4 AU once every 5 years and 9 months (2,107 days; semi-major axis of 3.22 AU). Its orbit has an eccentricity of 0.07 and an inclination of 16° with respect to the ecliptic.[1]

The body's observation arc begins with its first identification as A907 VA at Heidelberg in November 1907, almost 23 years prior to its official discovery observation.[15]

Physical characteristics

Margo has been characterized as a stony S-type asteroid by Pan-STARRS photometric survey.[14] Conversely, the Collaborative Asteroid Lightcurve Link (CALL) assumes it to be a carbonaceous C-type.[3]

Rotation period and poles

In November 2005, a rotational lightcurve of Margo was obtained from photometric observations by astronomers Raymond Poncy (177), Gino Farroni, Pierre Antonini, Donn Starkey (H63) and Raoul Behrend. Lightcurve analysis gave a well-defined rotation period of 6.0136 hours with a brightness amplitude of 0.31 magnitude ({{{1}}}).[9] Since then, several other, lower-rated lightcurves have been published ({{{1}}}).[8][9][11][12][13]

In 2016, the asteroid lightcurve has also been modeled using photometric data from various sources. It gave a concurring period of 6.01375 hours and two spin axis in ecliptic coordinates of (184.0°, −43.0°) and (353.0°, −17.0°).[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, Margo measures between 22.99 and 25.394 kilometers in diameter and its surface has an albedo between 0.2409 and 0.302.[5][6][7] CALL assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a much larger diameter of 58.29 kilometers based on an absolute magnitude of 9.9.[3]

Naming

This minor planet was named by the discoverer Karl Reinmuth. Any reference of its name to a person or occurrence is unknown.[2]

Unknown meaning

Among the many thousands of named minor planets, Margo is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth.[16]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 1175 Margo (1930 UD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001175. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1175) Margo". Dictionary of Minor Planet Names – (1175) Margo. Springer Berlin Heidelberg. p. 99. doi:10.1007/978-3-540-29925-7_1176. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (1175) Margo". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1175%7CMargo. 
  4. ↑ 4.0 4.1 "Asteroid 1175 Margo – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1175. 
  5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  6. ↑ 6.0 6.1 6.2 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. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 15 November 2017. 
  7. ↑ 7.0 7.1 7.2 7.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. 
  8. ↑ 8.0 8.1 Montgomery, Kent A.; Davis, Cheri; Renshaw, Thomas; Rolen, Jacob (October 2013). "Photometric Study of Four Asteroids at Texas A&M Commerce Observatory". The Minor Planet Bulletin 40 (4): 212–213. ISSN 1052-8091. Bibcode: 2013MPBu...40..212M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40..212M. Retrieved 15 November 2017. 
  9. ↑ 9.0 9.1 9.2 9.3 Behrend, Raoul. "Asteroids and comets rotation curves – (1175) Margo". Geneva Observatory. http://obswww.unige.ch/~behrend/page3cou.html#001175. 
  10. ↑ 10.0 10.1 Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M. et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics 586: 24. doi:10.1051/0004-6361/201527441. Bibcode: 2016A&A...586A.108H. 
  11. ↑ 11.0 11.1 Brinsfield, James W. (January 2010). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 2009 3rd Quarter". The Minor Planet Bulletin 37 (1): 19–20. ISSN 1052-8091. Bibcode: 2010MPBu...37...19B. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...19B. Retrieved 15 November 2017. 
  12. ↑ 12.0 12.1 Klinglesmith, Daniel A. III; Hanowell, Jesse; Warren, Curtis Alan (October 2014). "Lightcurves for Inversion Model Candidates". The Minor Planet Bulletin 41 (4): 206–208. ISSN 1052-8091. Bibcode: 2014MPBu...41..206K. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..206K. Retrieved 15 November 2017. 
  13. ↑ 13.0 13.1 Oliver, Robert Lemke; Shipley, Heath; Ditteon, Richard (October 2008). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 March". The Minor Planet Bulletin 35 (4): 149–150. ISSN 1052-8091. Bibcode: 2008MPBu...35..149O. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..149O. Retrieved 15 November 2017. 
  14. ↑ 14.0 14.1 14.2 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 15 November 2017. 
  15. ↑ 15.0 15.1 Cite error: Invalid <ref> tag; no text was provided for refs named MPC-object
  16. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named DOMPN-unknown

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