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725 Amanda

January 20, 2023

725 Amanda (prov. designation: A911 UQ or 1911 ND) is a dark background asteroid, approximately 22 kilometers (14 miles) in diameter, that is located in the central regions of the asteroid belt. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 21 October 1911.[1] The carbonaceous C-type asteroid (CSU/C0) has a short rotation period of 3.7 hours. It was named after Amanda Schorr, wife of German astronomer Richard Schorr (1867–1951).[2]

725 Amanda
Modelled shape of Amanda from its lightcurve
Discovery [1]
Discovered byJ. Palisa
Discovery siteVienna Obs.
Discovery date21 October 1911
Designations
(725) Amanda
PronunciationGerman: [aːˈmandaː][7]
Named after
Amanda Schorr, wife of Richard Schorr (1867–1951)
(German astronomer)[2]
A911 UQ · 2016 FH6
1911 ND
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc104.58 yr (38,198 d)
Aphelion3.1422 AU
Perihelion2.0022 AU
2.5722 AU
Eccentricity0.2216
4.13 yr (1,507 d)
114.51°
0° 14m 20.04s / day
Inclination3.7902°
68.679°
323.36°
Physical characteristics
Mean diameter
3.749 h[12]
  • (145.0°, −63.0°) (λ1/β1)[5]
  • (320.0°, −70.0°) (λ2/β2)[5]

Orbit and classification

Amanda is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5][6] It orbits the Sun in the central asteroid belt at a distance of 2.0–3.1 AU once every 4 years and 2 months (1,507 days; semi-major axis of 2.57 AU). Its orbit has an eccentricity of 0.22 and an inclination of 4° with respect to the ecliptic.[3] The body's observation arc begins at Vienna Observatory on 29 September 1915, almost four years after its official discovery observation.[1]

Naming

This minor planet was named after Amanda Schorr, wife of Richard Schorr (1867–1951), a German astronomer at Bergedorf Observatory, after whom asteroid 1235 Schorria and lunar crater Schorr were named. The asteroid's name was proposed by Palisa in 1913, on the occasion of the 24th meeting of the Astronomische Gesellschaft in Hamburg, Germany (AN 196, 139).[2] The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 73).[2]

Physical characteristics

In the Tholen classification, Amanda's spectral type is closest to that of a carbonaceous C-type asteroid, yet also somewhat similar to a stony S-type with an "unusual" spectrum (CSU).[3] In the taxonomy by Barucci (1987), the asteroid is a dark C-type (C0).[5]

Rotation period and poles

 
Lightcurve-based 3D-model of Amanda

A rotational lightcurve of Amanda was obtained from photometric observations by European astronomers at the La Silla Observatory before 1995. Lightcurve analysis gave a well-defined rotation period of 3.749 hours with a brightness variation of 0.35 magnitude (U=3).[12]

In October 2010, French amateur astronomer Maurice Audejean (B92) determined a concurring period of (3.7431±0.0003) hours with an amplitude of (0.42±0.01) magnitude (U=3),[13] while in August 2018, a further observation by the TESS-team reported a period of (3.74301±0.00005) hours and an amplitude of (0.27±0.05) magnitude (U=2).[14]

In 2016, a modeled lightcurve gave a sidereal period of 3.74311±0.00002 hours using data from the Uppsala Asteroid Photometric Catalogue, the Palomar Transient Factory survey, and individual observers, as well as sparse-in-time photometry from the NOFS, the Catalina Sky Survey, and the La Palma surveys (950). The study also determined two spin axes of (145.0°, −63.0°) and (320.0°, −70.0°) in ecliptic coordinates (λ, β).[15]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Amanda measures (20.49±0.28), (21.51±2.2) and (23.687±0.215) in diameter and its surface has an albedo of (0.082±0.003), (0.0721±0.017) and (0.068±0.015), respectively.[8][9][10][11]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0824 and calculates a diameter of 21.56 kilometers based on an absolute magnitude of 11.66.[16] Alternative mean-diameters published by the WISE team include (19.53±6.07 km), (21.68±6.40 km), (23.286±0.149 km) and (30.73±4.85 km) with a corresponding albedo of (0.08±0.04), (0.055±0.037), (0.0509±0.0052) and (0.03±0.03).[5][16]

References

  1. ^ a b c d e "725 Amanda (A911 UQ)". Minor Planet Center. Retrieved 15 June 2020.
  2. ^ a b c d Schmadel, Lutz D. (2007). "(725) Amanda". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 70. doi:10.1007/978-3-540-29925-7_726. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g h "JPL Small-Body Database Browser: 725 Amanda (A911 UQ)" (2020-04-28 last obs.). Jet Propulsion Laboratory. Retrieved 15 June 2020.
  4. ^ a b "Asteroid 725 Amanda – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 15 June 2020.
  5. ^ a b c d e f "Asteroid 725 Amanda – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 15 June 2020.
  6. ^ a b Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 15 June 2020.} (PDS main page)
  7. ^ (German Names)
  8. ^ 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)
  9. ^ 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 15 June 2020.
  10. ^ a b c d Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode:2016PDSS..247.....M. Retrieved 15 June 2020.
  11. ^ 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.
  12. ^ a b c di Martino, Mario; Dotto, E.; Barucci, M. A.; Fulchignoni, M.; Rotundi, A. (May 1994). "Photoelectric photometry of ten small and fast spinning asteroids". Icarus: 210–218. Bibcode:1994Icar..109..210D. doi:10.1006/icar.1994.1087. ISSN 0019-1035. Retrieved 15 June 2020.
  13. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (725) Amanda". Geneva Observatory. Retrieved 15 June 2020.
  14. ^ Pál, András; Szakáts, Róbert; Kiss, Csaba; Bódi, Attila; Bognár, Zsófia; Kalup, Csilla; et al. (March 2020). "Solar System Objects Observed with TESS—First Data Release: Bright Main-belt and Trojan Asteroids from the Southern Survey". The Astrophysical Journal Supplement Series. 247 (1): 26. arXiv:2001.05822. Bibcode:2020ApJS..247...26P. doi:10.3847/1538-4365/ab64f0. ISSN 0067-0049.
  15. ^ Hanuš, J.; Ďurech, J.; Brož, M.; Marciniak, A.; Warner, B. D.; Pilcher, F.; et al. (March 2013). "Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution". Astronomy and Astrophysics. 551: A67. arXiv:1301.6943. Bibcode:2013A&A...551A..67H. doi:10.1051/0004-6361/201220701. ISSN 0004-6361.
  16. ^ a b "LCDB Data for (725) Amanda". Asteroid Lightcurve Database (LCDB). Retrieved 15 June 2020.

External links

  • Lightcurve Database Query (LCDB), at www.minorplanet.info
  • Dictionary of Minor Planet Names, Google books
  • Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • 725 Amanda at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 725 Amanda at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

January 20, 2023
amanda, prov, designation, a911, 1911, dark, background, asteroid, approximately, kilometers, miles, diameter, that, located, central, regions, asteroid, belt, discovered, austrian, astronomer, johann, palisa, vienna, observatory, october, 1911, carbonaceous, . 725 Amanda prov designation A911 UQ or 1911 ND is a dark background asteroid approximately 22 kilometers 14 miles in diameter that is located in the central regions of the asteroid belt It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 21 October 1911 1 The carbonaceous C type asteroid CSU C0 has a short rotation period of 3 7 hours It was named after Amanda Schorr wife of German astronomer Richard Schorr 1867 1951 2 725 AmandaModelled shape of Amanda from its lightcurveDiscovery 1 Discovered byJ PalisaDiscovery siteVienna Obs Discovery date21 October 1911DesignationsMPC designation 725 AmandaPronunciationGerman aːˈmandaː 7 Named afterAmanda Schorr wife of Richard Schorr 1867 1951 German astronomer 2 Alternative designationsA911 UQ 2016 FH6 1911 NDMinor planet categorymain belt 1 3 middle background 4 5 6 Orbital characteristics 3 Epoch 31 May 2020 JD 2459000 5 Uncertainty parameter 0Observation arc104 58 yr 38 198 d Aphelion3 1422 AUPerihelion2 0022 AUSemi major axis2 5722 AUEccentricity0 2216Orbital period sidereal 4 13 yr 1 507 d Mean anomaly114 51 Mean motion0 14m 20 04s dayInclination3 7902 Longitude of ascending node68 679 Argument of perihelion323 36 Physical characteristicsMean diameter20 49 0 28 km 8 21 51 2 2 km 9 23 687 0 215 km 10 11 Synodic rotation period3 749 h 12 Pole ecliptic latitude 145 0 63 0 l1 b1 5 320 0 70 0 l2 b2 5 Geometric albedo0 068 0 015 10 11 0 0721 0 017 9 0 082 0 003 8 Spectral typeTholen CSU 3 C0 Barucci B V 0 738 0 046 3 U B 0 417 0 070 3 Absolute magnitude H 11 66 10 12 11 80 1 3 11 81 8 9 Contents 1 Orbit and classification 2 Naming 3 Physical characteristics 3 1 Rotation period and poles 3 2 Diameter and albedo 4 References 5 External linksOrbit and classification EditAmanda is a non family asteroid of the main belt s background population when applying the hierarchical clustering method to its proper orbital elements 4 5 6 It orbits the Sun in the central asteroid belt at a distance of 2 0 3 1 AU once every 4 years and 2 months 1 507 days semi major axis of 2 57 AU Its orbit has an eccentricity of 0 22 and an inclination of 4 with respect to the ecliptic 3 The body s observation arc begins at Vienna Observatory on 29 September 1915 almost four years after its official discovery observation 1 Naming EditThis minor planet was named after Amanda Schorr wife of Richard Schorr 1867 1951 a German astronomer at Bergedorf Observatory after whom asteroid 1235 Schorria and lunar crater Schorr were named The asteroid s name was proposed by Palisa in 1913 on the occasion of the 24th meeting of the Astronomische Gesellschaft in Hamburg Germany AN 196 139 2 The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 H 73 2 Physical characteristics EditIn the Tholen classification Amanda s spectral type is closest to that of a carbonaceous C type asteroid yet also somewhat similar to a stony S type with an unusual spectrum CSU 3 In the taxonomy by Barucci 1987 the asteroid is a dark C type C0 5 Rotation period and poles Edit Lightcurve based 3D model of Amanda A rotational lightcurve of Amanda was obtained from photometric observations by European astronomers at the La Silla Observatory before 1995 Lightcurve analysis gave a well defined rotation period of 3 749 hours with a brightness variation of 0 35 magnitude U 3 12 In October 2010 French amateur astronomer Maurice Audejean B92 determined a concurring period of 3 7431 0 0003 hours with an amplitude of 0 42 0 01 magnitude U 3 13 while in August 2018 a further observation by the TESS team reported a period of 3 74301 0 00005 hours and an amplitude of 0 27 0 05 magnitude U 2 14 In 2016 a modeled lightcurve gave a sidereal period of 3 74311 0 00002 hours using data from the Uppsala Asteroid Photometric Catalogue the Palomar Transient Factory survey and individual observers as well as sparse in time photometry from the NOFS the Catalina Sky Survey and the La Palma surveys 950 The study also determined two spin axes of 145 0 63 0 and 320 0 70 0 in ecliptic coordinates l b 15 Diameter and albedo Edit According to the surveys carried out by the Japanese Akari satellite the Infrared Astronomical Satellite IRAS and the NEOWISE mission of NASA s Wide field Infrared Survey Explorer WISE Amanda measures 20 49 0 28 21 51 2 2 and 23 687 0 215 in diameter and its surface has an albedo of 0 082 0 003 0 0721 0 017 and 0 068 0 015 respectively 8 9 10 11 The Collaborative Asteroid Lightcurve Link derives an albedo of 0 0824 and calculates a diameter of 21 56 kilometers based on an absolute magnitude of 11 66 16 Alternative mean diameters published by the WISE team include 19 53 6 07 km 21 68 6 40 km 23 286 0 149 km and 30 73 4 85 km with a corresponding albedo of 0 08 0 04 0 055 0 037 0 0509 0 0052 and 0 03 0 03 5 16 References Edit a b c d e 725 Amanda A911 UQ Minor Planet Center Retrieved 15 June 2020 a b c d Schmadel Lutz D 2007 725 Amanda Dictionary of Minor Planet Names Springer Berlin Heidelberg p 70 doi 10 1007 978 3 540 29925 7 726 ISBN 978 3 540 00238 3 a b c d e f g h JPL Small Body Database Browser 725 Amanda A911 UQ 2020 04 28 last obs Jet Propulsion Laboratory Retrieved 15 June 2020 a b Asteroid 725 Amanda Proper Elements AstDyS 2 Asteroids Dynamic Site Retrieved 15 June 2020 a b c d e f Asteroid 725 Amanda Nesvorny HCM Asteroid Families V3 0 Small Bodies Data Ferret Retrieved 15 June 2020 a b Zappala V Bendjoya Ph Cellino A Farinella P Froeschle C 1997 Asteroid Dynamical Families NASA Planetary Data System EAR A 5 DDR FAMILY V4 1 Retrieved 15 June 2020 PDS main page German Names a b c d Usui Fumihiko Kuroda Daisuke Muller 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 15 June 2020 a b c d Mainzer A K Bauer J M Cutri R M Grav T Kramer E A Masiero J R et al June 2016 NEOWISE Diameters and Albedos V1 0 NASA Planetary Data System Bibcode 2016PDSS 247 M Retrieved 15 June 2020 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 a b c di Martino Mario Dotto E Barucci M A Fulchignoni M Rotundi A May 1994 Photoelectric photometry of ten small and fast spinning asteroids Icarus 210 218 Bibcode 1994Icar 109 210D doi 10 1006 icar 1994 1087 ISSN 0019 1035 Retrieved 15 June 2020 Behrend Raoul Asteroids and comets rotation curves 725 Amanda Geneva Observatory Retrieved 15 June 2020 Pal Andras Szakats Robert Kiss Csaba Bodi Attila Bognar Zsofia Kalup Csilla et al March 2020 Solar System Objects Observed with TESS First Data Release Bright Main belt and Trojan Asteroids from the Southern Survey The Astrophysical Journal Supplement Series 247 1 26 arXiv 2001 05822 Bibcode 2020ApJS 247 26P doi 10 3847 1538 4365 ab64f0 ISSN 0067 0049 Hanus J Durech J Broz M Marciniak A Warner B D Pilcher F et al March 2013 Asteroids physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution Astronomy and Astrophysics 551 A67 arXiv 1301 6943 Bibcode 2013A amp A 551A 67H doi 10 1051 0004 6361 201220701 ISSN 0004 6361 a b LCDB Data for 725 Amanda Asteroid Lightcurve Database LCDB Retrieved 15 June 2020 External links EditLightcurve Database Query LCDB at www minorplanet info Dictionary of Minor Planet Names Google books Asteroids and comets rotation curves CdR Geneva Observatory Raoul Behrend Discovery Circumstances Numbered Minor Planets 1 5000 Minor Planet Center 725 Amanda at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 725 Amanda at the JPL Small Body Database Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 725 Amanda amp oldid 1123261204, wikipedia, wiki, book, books, library,

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