387 Aquitania

Orbital diagram

Discovery
Discovered by| F. Courty
Discovery site| Bordeaux Obs.
Discovery date| 5 March 1894
Designations

MPC designation

| (387) Aquitania
Pronunciation| /ækwɪˈteɪniə/[3]
Named after| Aquitaine[1]
(Roman Gallia Aquitania)

Alternative designations

| 1894 AZ * 1945 NA
1948 BG * 1953 EO1
Minor planet category| main-belt * (middle)
Postrema[2]
Orbital characteristics[4]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc| 123.56 yr (45,132 days)
|{{{apsis}}}|helion}}| 3.3853 AU
|{{{apsis}}}|helion}}| 2.0964 AU

Semi-major axis

| 2.7409 AU
Eccentricity| 0.2351
Orbital period| 4.54 yr (1,657 days)
Mean anomaly| 330.99°
Mean motion| 0° 13m 1.92s / day
Inclination| 18.113°
Longitude of ascending node| 128.24°

|{{{apsis}}}|helion}}

| 157.14°
Physical characteristics
Dimensions| 97.33±3.42 km[5]
100.51±2.9 km[6][4]
105.06±1.34 km[7]
Mass| (1.90±0.64)×1018 kg[8]
Template:Nwr
Mean density| 3.27 ± 1.11 g/cm3[8]
3.041 ± 1.259/0.595 g/cm3[9][lower-alpha 1]
Rotation period| 24.144 h (1.0060 d)[4]
Geometric albedo| 0.1900±0.011[6][4]

Spectral type

| Tholen = S[4]
SMASS = L[4]
B–V = 0.881[4]
U–B = 0.449[4]
Absolute magnitude (H)| 7.55[4][5][6][7] * 7.44±0.02[10][11]

Orbital diagram depicting Aquitania's 18° inclination.

387 Aquitainia, provisional designation 1894 AZ, is a Postremian asteroid from the central regions of the asteroid belt, approximately 101 kilometers in diameter. Discovered by Fernand Courty at the Bordeaux Observatory in 1894, it was named for the French region of Aquitaine, the former province of Gallia Aquitania in the ancient Roman Empire.[1]

## Contents

* 1 Discovery
* 2 Classification and orbit
* 3 Physical characteristics
* 4 Naming
* 5 Notes
* 6 References
* 7 External links

## Discovery

Aquitania was discovered by French astronomer Fernand Courty at the Bordeaux Observatory on 5 March 1894. It was second of his two asteroid discoveries.[12] The first was 384 Burdigala.

## Classification and orbit

Aquitania is the largest member of the Postrema family (541),[2] a mid-sized central asteroid family of little more than 100 members.[13]: 23 It orbits the Sun in the central main-belt at a distance of 2.1–3.4 AU once every 4 years and 6 months (1,657 days). Its orbit has an eccentricity of 0.24 and an inclination of 18° with respect to the ecliptic.[4]

## Physical characteristics

In the Tholen and SMASS classification, Aquitania is an S-type and L-type asteroid, respectively.[4] Several rotational lightcurves of Aquitania have been obtained from photometric observations since the 1980s. Lightcurve analysis gave a consolidated rotation period of 24.144 hours with a brightness variation between 0.09 and 0.25 magnitude ({{{1}}}).

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, Aquitania measures between 97.33 and 105.06 kilometers in diameter and its surface has an albedo between 0.174 and 0.203.[5][6][7]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.19 and a diameter of 100.51 kilometers based on an absolute magnitude of 7.44.[10]

## Naming

This minor planet was named for the Latin name of the French region of Aquitaine. Under Caesar the Roman region of Gallia Aquitania consisted of the country between the Pyrenees mountains and Garonne river. The region was later expanded to the Loire and Allier rivers under Augustus. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 42).[1]

## Notes

1. ↑ Assuming a diameter of 97 ± 4 km.

## References

1. ↑ 1.0 1.1 1.2 Schmadel, Lutz D. (2007). "(387) Aquitania". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 47. doi:10.1007/978-3-540-29925-7_388. ISBN 978-3-540-00238-3.
2. ↑ 2.0 2.1 "Asteroid 387 Aquitania – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=387+Aquitania.
3. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
4. ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 "JPL Small-Body Database Browser: 387 Aquitania (1894 AZ)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000387.
5. ↑ 5.0 5.1 5.2 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 19 October 2017.
6. ↑ 6.0 6.1 6.2 6.3 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019.
7. ↑ 7.0 7.1 7.2 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. ↑ 8.0 8.1 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
9. ↑ Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society 492 (1). doi:10.1093/mnras/stz3407. https://academic.oup.com/mnras/article/492/1/589/5658701.
10. ↑ 10.0 10.1 "LCDB Data for (387) Aquitania". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=387|Aquitania.
11. ↑ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus 221 (1): 365–387. doi:10.1016/j.icarus.2012.07.026. Bibcode: 2012Icar..221..365P. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P. Retrieved 19 October 2017.
12. ↑ "387 Aquitania (1894 AZ)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=387.
13. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N.

## 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
* 387 Aquitania at AstDyS-2, Asteroids—Dynamic Site
* Ephemeris * Observation prediction * Orbital info * Proper elements * Observational info
* 387 Aquitania at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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