Discovery[1] | |
---|---|
Discovered by | M. F. Wolf |
Discovery site | Heidelberg Obs. |
Discovery date | 5 October 1931 |
Designations | |
(1203) Nanna | |
Named after | Anna Risi (model of painter) Anselm Feuerbach[2] |
1931 TA · 1926 RH 1978 AD | |
main-belt · (outer)[3] | |
Orbital characteristics[1] | |
Epoch 16 February 2017 (JD 2457800.5) | |
Uncertainty parameter 0 | |
Observation arc | 90.24 yr (32,960 days) |
Aphelion | 3.6055 AU |
Perihelion | 2.1795 AU |
2.8925 AU | |
Eccentricity | 0.2465 |
4.92 yr (1,797 days) | |
137.21° | |
0° 12m 1.44s / day | |
Inclination | 5.9706° |
224.58° | |
176.38° | |
Physical characteristics | |
Dimensions | 31.80±1.22 km[4] 32.59±0.87 km[5] 35.06 km (derived)[3] 35.18±3.9 km (IRAS:2)[6] 35.92±15.13 km[7] 37.91±12.03 km[8] |
15.6±0.1 h (dated)[9] 18.54±0.01 h[10] 25.80±0.05 h[11] | |
0.028±0.017[7] 0.03±0.01[8] 0.03 (derived)[3] 0.04±0.00[4] 0.0473±0.012 (IRAS:2)[6] 0.056±0.004[5] | |
C[3] | |
11.20[5][6] · 11.60[8] · 11.63±0.24[12] · 11.7[1][3] · 11.71[4][7] | |
1203 Nanna (provisional designation 1931 TA) is a carbonaceous asteroid from the outer region of the asteroid belt, about 35 kilometers in diameter. It was discovered on 5 October 1931, by German astronomer Max Wolf at Heidelberg Observatory in southwest Germany,[13] and named after Anna Risi, a model and mistress of painter Anselm Feuerbach.[2]
Orbit
[edit]Nanna is a dark C-type asteroid. It orbits the Sun at a distance of 2.2–3.6 AU once every 4 years and 11 months (1,797 days). Its orbit has an eccentricity of 0.25 and an inclination of 6° with respect to the ecliptic.[1] In 1926, it was first identified as 1926 RH, extending the body's observation arc by 5 years prior to its official discovery observation.[13]
Rotation period
[edit]In September 2009, two rotational lightcurves of Nanna were obtained by American astronomer Brian Warner from photometric observations at his Palmer Divided Observatory in Colorado. The first lightcurve analysis gave a rotation period of 18.54 hours with a brightness variation of 0.12 magnitude (U=2), while the second lightcurve was ambiguous giving a period of 25.80 and 12.90 hours, respectively, and an amplitude of 0.15 (U=2).[10] These results supersede a fragmentary lightcurve taken by French amateur astronomers Federico Manzini, Laurent Bernasconi and René Roy from August 2004, which gave a period of 15.6 hours (U=1).[9]
Diameter and albedo
[edit]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, Nanna measures between 31.80 and 37.91 kilometers in diameter and its surface has an albedo of 0.028 and 0.056.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.03 and a diameter of 35.06 kilometers with an absolute magnitude of 11.7.[3]
Naming
[edit]This minor planet was named after Anna Risi, a model in several paintings by German classicist painter Anselm Feuerbach.[2] The official naming citation was published by Paul Herget in The Names of the Minor Planets in 1955 (H 112).[2]
References
[edit]- ^ a b c d "JPL Small-Body Database Browser: 1203 Nanna (1931 TA)" (2017-01-02 last obs.). Jet Propulsion Laboratory. Retrieved 13 February 2017.
- ^ a b c d Schmadel, Lutz D. (2007). "(1203) Nanna". Dictionary of Minor Planet Names – (1203) Nanna. Springer Berlin Heidelberg. pp. 100–101. doi:10.1007/978-3-540-29925-7_1204. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (1203) Nanna". Asteroid Lightcurve Database (LCDB). Retrieved 13 February 2017.
- ^ a b c d 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.
- ^ a b c d 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)
- ^ a b c d 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.
- ^ a b c d 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. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. S2CID 46350317. Retrieved 13 February 2017.
- ^ a b c d 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 13 February 2017.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1203) Nanna". Geneva Observatory. Retrieved 13 February 2017.
- ^ a b Warner, Brian D. (April 2011). "Upon Further Review: VI. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 38 (2): 96–101. Bibcode:2011MPBu...38...96W. ISSN 1052-8091. Retrieved 13 February 2017.
- ^ Warner, Brian D. (January 2010). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 June-September". The Minor Planet Bulletin. 37 (1): 24–27. Bibcode:2010MPBu...37...24W. ISSN 1052-8091. Retrieved 13 February 2017.
- ^ 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 13 February 2017.
- ^ a b "1203 Nanna (1931 TA)". Minor Planet Center. Retrieved 13 February 2017.
External links
[edit]- Lightcurve plot of 1203 Nanna, Palmer Divide Observatory, B. D. Warner (2009)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- 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
- 1203 Nanna at AstDyS-2, Asteroids—Dynamic Site
- 1203 Nanna at the JPL Small-Body Database