1016 Anitra
1016 Anitra, provisional designation 1924 QG, is a stony Florian asteroid and suspected asynchronous binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter.
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 31 January 1924 |
| Designations | |
| (1016) Anitra | |
| Pronunciation | /əˈniːtrə/ |
Named after | fictional character in drama Peer Gynt[2] |
| 1924 QG · 1929 TE1 | |
| main-belt · (inner)[3] Flora[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.42 yr (34,123 days) |
| Aphelion | 2.5035 AU |
| Perihelion | 1.9356 AU |
| 2.2196 AU | |
| Eccentricity | 0.1279 |
| 3.31 yr (1,208 days) | |
| 176.01° | |
| 0° 17m 53.16s / day | |
| Inclination | 6.0352° |
| 8.8588° | |
| 53.320° | |
| Known satellites | 1[5][6] |
| Physical characteristics | |
| Dimensions | 9.539±0.078 km[7] 10.302±0.068 km[8] 12.97 km (calculated)[3] |
| 5.928±0.001 h[9] 5.9288±0.0005 h[10] 5.929±0.001 h[11] 5.9295±0.0005 h[12] 5.92951 h[3] 5.9294±0.0001 h[6] 5.9300±0.0001 h[6] 5.930 h[13] 5.93 h[a] 5.9301±0.0003 h[14] | |
| 0.20 (assumed)[3] 0.2728±0.0572[8] 0.308±0.048[7] | |
| SMASS = S[1] · S[3] | |
| 11.8[3] · 11.9[1] · 12.0[8] | |
It was discovered on 31 January 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[15] The asteroid was likely named after the fictional character Anitra from Henrik Ibsen's drama Peer Gynt.[2]
Orbit and classification edit
Anitra is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt.[4][16]: 23
It orbits the Sun in the inner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,208 days). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic.[1] The asteroid's observation arc begins at Heidelberg, 12 days after to its official discovery observation.[15]
Physical characteristics edit
In the SMASS classification, Anitra is a common, stony S-type asteroid.[1]
Rotation period edit
In November 2015, a rotational lightcurve of Anitra was obtained from photometric observations by an international collaborations of astronomers who combined their observational results. Lightcurve analysis gave a rotation period of 5.92951 hours with a brightness amplitude of 0.30 magnitude (U=3).[6]
Binary system edit
Anitra is a suspected asynchronous binary asteroid, a system with a fairly large separation, for which tidal forces have been insufficient to synchronize the periods within the system's lifetime.[5][6] The likely minor-planet moon has a rotation period of 2.609 hours and is thought to orbit its primary every 240 hours. The results, however, are still tentative.[3] More than 100 known binaries from the asteroid belt have already been discovered.
Diameter and albedo edit
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Anitra measures 9.539 and 10.302 kilometers in diameter and its surface has an albedo of 0.2728 and 0.308, respectively.[7][8]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony S-type asteroids of 0.20 and calculates a diameter of 12.97 kilometers based on an absolute magnitude of 11.8.[3]
Naming edit
This minor planet was probably named after the Arabian dancer Anitra, daughter of a Bedouin chief in Henrik Ibsen's drama Peer Gynt, a five-act play in verse. The music was composed by Edvard Grieg who named one piece "Anitra's Dance".[2] The minor planets (4872) and (5696) are named after Grieg and Ibsen, respectively.[2]
The official naming citation is based on research by Lutz Schmadel and feedback from astronomers R. Bremer and I. van Houten-Groeneveld.[2]
Notes edit
- ^ Menke (2011) web: rotation period 5.93 hours with a brightness amplitude of 0.50 magnitude and a quality code of 2. Summary figures at Collaborative Asteroid Lightcurve Link (CALL)
References edit
- ^ a b c d e f "JPL Small-Body Database Browser: 1016 Anitra (1924 QG)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 29 August 2017.
- ^ a b c d e Schmadel, Lutz D. (2007). "(1016) Anitra". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. pp. 87–88. doi:10.1007/978-3-540-29925-7_1017. ISBN 978-3-540-00238-3.
- ^ a b c d e f g h "LCDB Data for (1016) Anitra". Asteroid Lightcurve Database (LCDB). Retrieved 29 August 2017.
- ^ a b "Asteroid 1016 Anitra – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 24 October 2019.
- ^ a b Johnston, Robert (16 July 2017). "(1016) Anitra". johnstonsarchive.net. Retrieved 29 August 2017.
- ^ a b c d e Pilcher, Frederick; Benishek, Vladimir; Jacobsen, Jens; Kristensen, Leif Hugo; Lang, Kim; Larsen, Frank R.; et al. (July 2016). "Minor Planet 1016 Anitra: A Likely Asynchronous Binary". The Minor Planet Bulletin. 43 (3): 274–277. Bibcode:2016MPBu...43..274P. ISSN 1052-8091. Retrieved 29 August 2017.
- ^ a b c 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 29 August 2017.
- ^ a b c d 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.
- ^ Pray, Donald P.; Galad, Adrian; Gajdos, Stefan; Vilagi, Jozef; Cooney, Walt; Gross, John; et al. (December 2006). "Lightcurve analysis of asteroids 53, 698, 1016, 1523, 1950, 4608, 5080 6170, 7760, 8213, 11271, 14257, 15350 and 17509". The Minor Planet Bulletin. 33 (4): 92–95. Bibcode:2006MPBu...33...92P. ISSN 1052-8091. Retrieved 29 August 2017.
- ^ Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; Ivanova, V.; Apostolovska, G.; et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy and Astrophysics. 546: 51. Bibcode:2012A&A...546A..72K. doi:10.1051/0004-6361/201219199.
- ^ Alkema, Michael S. (July 2013). "Asteroid Lightcurve Analysis at Elephant Head Observatory: 2012 November - 2013 April". The Minor Planet Bulletin. 40 (3): 133–137. Bibcode:2013MPBu...40..133A. ISSN 1052-8091. Retrieved 29 August 2017.
- ^ Klinglesmith, Daniel K., III (October 2017). "Asteroids Observed from Estcorn Observatory". The Minor Planet Bulletin. 44 (4): 345–348. Bibcode:2017MPBu...44..345K. ISSN 1052-8091. Retrieved 17 October 2017.
{{cite journal}}: CS1 maint: numeric names: authors list (link) - ^ Menke, John L. (September 2005). "Lightcurves and periods for asteroids 471 Papagena, 675 Ludmilla, 1016 Anitra, 1127 Mimi, 1165 Imprinetta, 1171 Rustahawelia, and 2283 Bunke". The Minor Planet Bulletin. 32 (3): 64–66. Bibcode:2005MPBu...32...64M. ISSN 1052-8091. Retrieved 29 August 2017.
- ^ Schmidt, Richard E. (April 2016). "NIR Minor Planet Photometry form Burleith Observatory, 2015". The Minor Planet Bulletin. 43 (2): 129–131. Bibcode:2016MPBu...43..129S. ISSN 1052-8091. Retrieved 29 August 2017.
- ^ a b "1016 Anitra (1924 QG)". Minor Planet Center. Retrieved 29 August 2017.
- ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
External links edit
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Asteroid Lightcurve Database (LCDB), query form (info 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
- 1016 Anitra at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 1016 Anitra at the JPL Small-Body Database