Astronomy:647 Adelgunde
| Discovery [1] | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg Obs. |
| Discovery date | 11 September 1907 |
| Designations | |
| (647) Adelgunde | |
| Named after | unknown [2] |
| 1907 AD · 1930 SA 1949 YJ · 1960 PA | |
| Minor planet category | main-belt · (inner) [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.79 yr (40,102 days) |
| |{{{apsis}}}|helion}} | 2.9166 AU |
| |{{{apsis}}}|helion}} | 1.9659 AU |
| 2.4412 AU | |
| Eccentricity | 0.1947 |
| Orbital period | 3.81 yr (1,393 days) |
| Mean anomaly | 237.76° |
| Mean motion | 0° 15m 30.24s / day |
| Inclination | 7.3311° |
| Longitude of ascending node | 254.68° |
| 175.79° | |
| Physical characteristics | |
| Dimensions | 9.725±0.092[4] 9.769±0.108 km[5] 9.93±0.59 km[6] 13.69±0.76 km[7] 15.52 km (calculated)[3] |
| Rotation period | 32.202±0.007 h[8] |
| Geometric albedo | 0.20 (assumed)[3] 0.257±0.031[7] 0.488±0.105[6] 0.508±0.040[4] 0.5143±0.0862[5] |
| Tholen = X [1] · S [3] B–V = 0.719[1] U–B = 0.297[1] | |
| Absolute magnitude (H) | 10.89±0.57[9] · 11.41[1][3][5][6][7] |
647 Adelgunde, provisional designation 1907 AD, is a stony asteroid from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 11 September 1907, by German astronomer August Kopff at Heidelberg Observatory in southern Germany.[10] The origin of the asteroid's name is unknown,[2] it may be derived from the name of Princess Adelgunde of Bavaria.
Orbit and classification
Adelgunde orbits the Sun in the inner main-belt at a distance of 2.0–2.9 AU once every 3 years and 10 months (1,393 days). Its orbit has an eccentricity of 0.19 and an inclination of 7° with respect to the ecliptic.[1] As no precoveries were taken, Adelgunde's observation arc begins with its official discovery observation.[10]
Physical characteristics
Diameter and albedo
According to the space-based observations by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, Adelgunde measures between 9.72 and 9.93 kilometers in diameter, and its surface has a high albedo of 0.488–0.514.[4][5][6]
Based on the survey carried out by the Japanese Akari satellite, it measures 13.7 kilometers with an albedo of 0.26.[7] The Collaborative Asteroid Lightcurve Link (CALL) agrees with the results obtained by AKARI, assumes a standard albedo for stony asteroids of 0.20, and calculates a diameter of 15.5 kilometers with an absolute magnitude of 11.41.[3] As the diameters are typically inferred from the body's absolute brightness and its reflectively, a higher albedo results in a smaller diameter.
Spectral type
Adelgunde is an X-type asteroid on the Tholen taxonomic scheme,[1] while CALL assumes it to be a stony S-type asteroid.[3]
Rotation period
In August 2006, a rotational lightcurve of Adelgunde was obtained from photometric observations by astronomers Pierre Antonini and Antonio Vagnozzi. Lightcurve analysis gave a well-defined rotation period of 32.202 hours with a brightness variation of 0.28 in magnitude ({{{1}}}).[8]
Name
The origin of this minor planet's name is unknown.[2] It is speculated that the name comes from a list created in 1913 by the Astronomisches Rechen-Institut (ARI) containing suggestions of female names from history and mythology for the naming of minor planets. At the time, the naming process was not well developed and the ARI feared inconsistencies and potential confusion. The list was sent to several German astronomers, including Kopff, with the invitation to name all of their made discoveries up to number 700.[11]
Unknown meaning
Among the many thousands of named minor planets, Adelgunde 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.[12]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "JPL Small-Body Database Browser: 647 Adelgunde (1907 AD)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000647.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(647) Adelgunde". Dictionary of Minor Planet Names – (647) Adelgunde. Springer Berlin Heidelberg. p. 64. doi:10.1007/978-3-540-29925-7_648. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (647) Adelgunde". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=647%7CAdelgunde.
- ↑ 4.0 4.1 4.2 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 12 December 2016.
- ↑ 5.0 5.1 5.2 5.3 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.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 11 August 2016.
- ↑ 7.0 7.1 7.2 7.3 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)
- ↑ 8.0 8.1 Behrend, Raoul. "Asteroids and comets rotation curves – (647) Adelgunde". Geneva Observatory. http://obswww.unige.ch/~behrend/page2cou.html#000647.
- ↑ 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 11 August 2016.
- ↑ 10.0 10.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedMPC-Adelgunde - ↑ Schmadel, Lutz D. (2007). "(579) Sidonia". Dictionary of Minor Planet Names – (579) Sidonia; Naming ARI guidelines. Springer Berlin Heidelberg. pp. 59–60. doi:10.1007/978-3-540-29925-7_580. ISBN 978-3-540-00238-3.
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedDOMPN-unknown
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 647 Adelgunde at AstDyS-2, Asteroids—Dynamic Site
- 647 Adelgunde at the JPL Small-Body Database
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