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1151 Ithaka

October 21, 2023

1151 Ithaka, provisional designation 1929 RK, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in 1929, and later named for the Greek island of Ithaca.[11]

1151 Ithaka
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date8 September 1929
Designations
(1151) Ithaka
Named after
Ithaca (Greek Ionian Island)[2]
1929 RK · 1966 LA
main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc87.63 yr (32,007 days)
Aphelion3.0719 AU
Perihelion1.7417 AU
2.4068 AU
Eccentricity0.2763
3.73 yr (1,364 days)
212.71°
0° 15m 50.4s / day
Inclination6.5616°
225.42°
122.36°
Earth MOID0.7459 AU · 290.6 LD
Physical characteristics
Dimensions8.97±2.41 km[4]
12.120±0.100 km[5][6]
14±3 km[7]
14.37 km (derived)[3]
20.46±4.51 km[8]
4.93115±0.00011 h[7]
4.9314±0.0003 h[a]
4.932±0.001 h[9]
0.02±0.02[8]
0.057 (assumed)[3]
0.069±0.003[5]
0.0692±0.0033[6]
0.13±0.10[4]
C[3]
12.90±0.56[10] · 12.94[3] · 12.94±0.03[7] · 13.10[4][6] · 13.12[8] · 13.2[1]

Discovery Edit

Ithaka was discovered on 8 September 1929, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany.[11] Five nights later, it was independently discovered by Soviet astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula.[2] Only the first discoverer is acknowledged by the Minor Planet Center.[11] The body's observation arc begins with its official discovery observation at Heidelberg.[11]

Orbit and classification Edit

Ithaka is a non-family asteroid from the background population. It orbits the Sun in the inner main-belt at a distance of 1.7–3.1 AU once every 3 years and 9 months (1,364 days). Its orbit has an eccentricity of 0.28 and an inclination of 7° with respect to the ecliptic.[1]

Physical characteristics Edit

Ithaka is an assumed carbonaceous C-type asteroid,[3] untypical for inner-belt asteroids.

Rotation period Edit

In 2011, three rotational lightcurves of Ithaka were obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period between 4.93115 and 4.932 hours with a brightness amplitude of 0.12 to 0.15 magnitude (U=3/3/3).[7][9][a]

Diameter and albedo Edit

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ithaka measures between 8.97 and 20.46 kilometers in diameter and its surface has an albedo between 0.02 and 0.13.[4][5][6][8] A collaboration of Italian and American photometrists estimate a diameter of 14±3 kilometers,[7] and the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and derives a diameter of 14.37 kilometers based on an absolute magnitude of 12.94.[3]

Naming Edit

This minor planet was named after the Greek Ionian Island of Ithaca located in the Ionian Sea. In Greek mythology, the legendary hero Odysseus was the King of Ithaca (also see 1143 Odysseus). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 107).[2]

Notes Edit

  1. ^ a b Pravec (2011), lightcurve plot of (1151) Ithaka. Observation: 14 September 2011. Rotation period 4.9314±0.0003 hours with a brightness amplitude of 0.12±0.01 mag. Quality Code of 3. Summary figures at Ondrejov Asteroid Photometry Project and LCDB

References Edit

  1. ^ a b c d "JPL Small-Body Database Browser: 1151 Ithaka (1929 RK)" (2017-04-26 last obs.). Jet Propulsion Laboratory. Retrieved 8 September 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1151) Ithaka". Dictionary of Minor Planet Names – (1151) Ithaka. Springer Berlin Heidelberg. p. 97. doi:10.1007/978-3-540-29925-7_1152. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f g "LCDB Data for (1151) Ithaka". Asteroid Lightcurve Database (LCDB). Retrieved 8 September 2017.
  4. ^ 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. Retrieved 8 September 2017.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 8 September 2017.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  6. ^ 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.
  7. ^ a b c d e Franco, Lorenzo; Ferrero, Andrea; Durkee, Russell I. (April 2012). "Lightcurve Photometry and H-G Parameters for 1151 Ithaka". The Minor Planet Bulletin. 39 (2): 47–48. Bibcode:2012MPBu...39...47F. ISSN 1052-8091. Retrieved 8 September 2017.
  8. ^ 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. Retrieved 8 September 2017.
  9. ^ a b Aymami, Josep Maria (January 2012). "CCD Photometry and Lightcurve Analysis of Main Belt Asteroids 1077 Campanula and 1151 Ithaka from Observatori Carmelita". The Minor Planet Bulletin. 39 (1): 29. Bibcode:2012MPBu...39...29A. ISSN 1052-8091. Retrieved 8 September 2017.
  10. ^ 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 8 September 2017.
  11. ^ a b c d "1151 Ithaka (1929 RK)". Minor Planet Center. Retrieved 8 September 2017.

External links Edit

  • 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
  • 1151 Ithaka at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 1151 Ithaka at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

October 21, 2023
1151, ithaka, provisional, designation, 1929, carbonaceous, asteroid, from, inner, regions, asteroid, belt, approximately, kilometers, diameter, discovered, karl, reinmuth, heidelberg, königstuhl, state, observatory, 1929, later, named, greek, island, ithaca, . 1151 Ithaka provisional designation 1929 RK is a carbonaceous asteroid from the inner regions of the asteroid belt approximately 14 kilometers in diameter It was discovered by Karl Reinmuth at the Heidelberg Konigstuhl State Observatory in 1929 and later named for the Greek island of Ithaca 11 1151 IthakaDiscovery 1 Discovered byK ReinmuthDiscovery siteHeidelberg Obs Discovery date8 September 1929DesignationsMPC designation 1151 IthakaNamed afterIthaca Greek Ionian Island 2 Alternative designations1929 RK 1966 LAMinor planet categorymain belt inner 3 Orbital characteristics 1 Epoch 4 September 2017 JD 2458000 5 Uncertainty parameter 0Observation arc87 63 yr 32 007 days Aphelion3 0719 AUPerihelion1 7417 AUSemi major axis2 4068 AUEccentricity0 2763Orbital period sidereal 3 73 yr 1 364 days Mean anomaly212 71 Mean motion0 15m 50 4s dayInclination6 5616 Longitude of ascending node225 42 Argument of perihelion122 36 Earth MOID0 7459 AU 290 6 LDPhysical characteristicsDimensions8 97 2 41 km 4 12 120 0 100 km 5 6 14 3 km 7 14 37 km derived 3 20 46 4 51 km 8 Synodic rotation period4 93115 0 00011 h 7 4 9314 0 0003 h a 4 932 0 001 h 9 Geometric albedo0 02 0 02 8 0 057 assumed 3 0 069 0 003 5 0 0692 0 0033 6 0 13 0 10 4 Spectral typeC 3 Absolute magnitude H 12 90 0 56 10 12 94 3 12 94 0 03 7 13 10 4 6 13 12 8 13 2 1 Contents 1 Discovery 2 Orbit and classification 3 Physical characteristics 3 1 Rotation period 3 2 Diameter and albedo 4 Naming 5 Notes 6 References 7 External linksDiscovery EditIthaka was discovered on 8 September 1929 by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany 11 Five nights later it was independently discovered by Soviet astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula 2 Only the first discoverer is acknowledged by the Minor Planet Center 11 The body s observation arc begins with its official discovery observation at Heidelberg 11 Orbit and classification EditIthaka is a non family asteroid from the background population It orbits the Sun in the inner main belt at a distance of 1 7 3 1 AU once every 3 years and 9 months 1 364 days Its orbit has an eccentricity of 0 28 and an inclination of 7 with respect to the ecliptic 1 Physical characteristics EditIthaka is an assumed carbonaceous C type asteroid 3 untypical for inner belt asteroids Rotation period Edit In 2011 three rotational lightcurves of Ithaka were obtained from photometric observations Lightcurve analysis gave a well defined rotation period between 4 93115 and 4 932 hours with a brightness amplitude of 0 12 to 0 15 magnitude U 3 3 3 7 9 a Diameter and albedo Edit According to the survey carried out by the NEOWISE mission of NASA s Wide field Infrared Survey Explorer Ithaka measures between 8 97 and 20 46 kilometers in diameter and its surface has an albedo between 0 02 and 0 13 4 5 6 8 A collaboration of Italian and American photometrists estimate a diameter of 14 3 kilometers 7 and the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0 057 and derives a diameter of 14 37 kilometers based on an absolute magnitude of 12 94 3 Naming EditThis minor planet was named after the Greek Ionian Island of Ithaca located in the Ionian Sea In Greek mythology the legendary hero Odysseus was the King of Ithaca also see 1143 Odysseus The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 H 107 2 Notes Edit a b Pravec 2011 lightcurve plot of 1151 Ithaka Observation 14 September 2011 Rotation period 4 9314 0 0003 hours with a brightness amplitude of 0 12 0 01 mag Quality Code of 3 Summary figures at Ondrejov Asteroid Photometry Project and LCDBReferences Edit a b c d JPL Small Body Database Browser 1151 Ithaka 1929 RK 2017 04 26 last obs Jet Propulsion Laboratory Retrieved 8 September 2017 a b c Schmadel Lutz D 2007 1151 Ithaka Dictionary of Minor Planet Names 1151 Ithaka Springer Berlin Heidelberg p 97 doi 10 1007 978 3 540 29925 7 1152 ISBN 978 3 540 00238 3 a b c d e f g LCDB Data for 1151 Ithaka Asteroid Lightcurve Database LCDB Retrieved 8 September 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 Retrieved 8 September 2017 a b c Masiero Joseph R Mainzer A K Grav T Bauer J M Cutri R M Dailey J et al November 2011 Main Belt Asteroids with WISE NEOWISE I Preliminary Albedos and Diameters The Astrophysical Journal 741 2 20 arXiv 1109 4096 Bibcode 2011ApJ 741 68M doi 10 1088 0004 637X 741 2 68 Retrieved 8 September 2017 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint multiple names authors list link 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 a b c d e Franco Lorenzo Ferrero Andrea Durkee Russell I April 2012 Lightcurve Photometry and H G Parameters for 1151 Ithaka The Minor Planet Bulletin 39 2 47 48 Bibcode 2012MPBu 39 47F ISSN 1052 8091 Retrieved 8 September 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 Retrieved 8 September 2017 a b Aymami Josep Maria January 2012 CCD Photometry and Lightcurve Analysis of Main Belt Asteroids 1077 Campanula and 1151 Ithaka from Observatori Carmelita The Minor Planet Bulletin 39 1 29 Bibcode 2012MPBu 39 29A ISSN 1052 8091 Retrieved 8 September 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 8 September 2017 a b c d 1151 Ithaka 1929 RK Minor Planet Center Retrieved 8 September 2017 External links EditAsteroid 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 Geneve Raoul Behrend Discovery Circumstances Numbered Minor Planets 1 5000 Minor Planet Center 1151 Ithaka at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 1151 Ithaka at the JPL Small Body Database nbsp Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 1151 Ithaka amp oldid 1123253085, wikipedia, wiki, book, books, library,

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