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1184 Gaea

January 23, 2023

1184 Gaea, provisional designation 1926 RE, is an Aerian asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 September 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[10] The asteroid was named after the goddess of Earth, Gaea (Gaia), from Greek mythology.[2]

1184 Gaea
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date5 September 1926
Designations
(1184) Gaea
Pronunciation/ˈdʒiːə/[5]
Named after
Gaea (Gaia)[2]
(Greek mythology)
1926 RE · 1930 OE
1931 XG
main-belt · (middle)[3]
Aeria[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc91.06 yr (33,260 days)
Aphelion2.8555 AU
Perihelion2.4804 AU
2.6680 AU
Eccentricity0.0703
4.36 yr (1,592 days)
0.0836°
0° 13m 34.32s / day
Inclination11.315°
355.75°
311.34°
Physical characteristics
Dimensions11.783±0.296 km[6]
12.048±0.146 km[7]
26.52 km (calculated)[3]
2.94±0.06 h[8]
0.10 (assumed)[3][a]
0.4512±0.0298[7]
0.462±0.061[6]
S/C (assumed)[3][a]
11.0[1][3] · 11.1[7] · 11.42±0.31[9]

Orbit and classification

Gaea is a member of the small Aeria family (539),[4] named after its parent body 369 Aeria.[11]: 23  It orbits the Sun in the central main-belt at a distance of 2.5–2.9 AU once every 4 years and 4 months (1,592 days). Its orbit has an eccentricity of 0.07 and an inclination of 11° with respect to the ecliptic.[1]

The body's observation arc begins at Heidelberg in November 1925, more than 2 months after its official discovery observation.[10]

Physical characteristics

The asteroid's spectral type is unknown. The LCDB assumes a stony (S) or carbonaceous (C) composition to be equally likely,[a] while the overall spectral type for members of the Aeria family is that of an X-type.[11]: 23  The high albedo figures obtained from observations with the WISE telescope do not agree with neither of these spectral types (see below).[7]

Rotation period

In January 2011, a rotational lightcurve of Gaea was obtained from photometric observations by French amateur astronomer René Roy. Lightcurve analysis gave a short rotation period of 2.94 hours with a brightness amplitude of 0.09 magnitude (U=2).[8] A low brightness amplitude also indicates that the body might have a spheroidal rather than an irregular shape.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Gaea measures 11.783 and 12.048 kilometers in diameter and its surface has a high albedo of 0.462 and 0.4512, respectively.[6][7]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value between the stony (0.20) and carbonaceous (0.057) asteroids, both found abundantly in this region of the asteroid belt – and consequently calculates a much larger diameter of 26.52 kilometers based on an absolute magnitude of 11.0.[3]

Naming

This minor planet was named after Gaia (or Gaea), the goddess of Earth in Greek mythology. Her son and husband was Uranus, the god of the sky. Uranus and Gaia were the parents of the first generation of Titans (six males and six females), and the ancestors of most of the Greek gods. The asteroid's name was proposed by German ARI-astronomer Gustav Stracke after whom the asteroid 1019 Strackea was named.[2]

Notes

  1. ^ a b c Generic stony/carbonaceous composition with a compromise albedo of 0.10, for asteroids with an semi-major axis of 2.6–2.7 AU, according to LCDB's – 2. Taxonomic Class, orbital class, and albedo

References

  1. ^ a b c d "JPL Small-Body Database Browser: 1184 Gaea (1926 RE)" (2017-09-27 last obs.). Jet Propulsion Laboratory. Retrieved 24 October 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1184) Gaea". Dictionary of Minor Planet Names – (1184) Gaea. Springer Berlin Heidelberg. p. 99. doi:10.1007/978-3-540-29925-7_1185. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (1184) Gaea". Asteroid Lightcurve Database (LCDB). Retrieved 24 October 2017.
  4. ^ a b "Asteroid 1184 Gaea – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
  5. ^ "Gaea". Merriam-Webster Dictionary.
  6. ^ 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 24 October 2017.
  7. ^ a b c d e 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.
  8. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1184) Gaea". Geneva Observatory. Retrieved 24 October 2017.
  9. ^ 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 24 October 2017.
  10. ^ a b "1184 Gaea (1926 RE)". Minor Planet Center. Retrieved 24 October 2017.
  11. ^ a b 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

  • 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
  • 1184 Gaea at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 1184 Gaea at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

January 23, 2023
1184, gaea, provisional, designation, 1926, aerian, asteroid, from, central, regions, asteroid, belt, approximately, kilometers, diameter, discovered, september, 1926, astronomer, karl, reinmuth, heidelberg, königstuhl, state, observatory, southwest, germany, . 1184 Gaea provisional designation 1926 RE is an Aerian asteroid from the central regions of the asteroid belt approximately 20 kilometers in diameter It was discovered on 5 September 1926 by astronomer Karl Reinmuth at the Heidelberg Konigstuhl State Observatory in southwest Germany 10 The asteroid was named after the goddess of Earth Gaea Gaia from Greek mythology 2 1184 GaeaDiscovery 1 Discovered byK ReinmuthDiscovery siteHeidelberg Obs Discovery date5 September 1926DesignationsMPC designation 1184 GaeaPronunciation ˈ dʒ iː e 5 Named afterGaea Gaia 2 Greek mythology Alternative designations1926 RE 1930 OE1931 XGMinor planet categorymain belt middle 3 Aeria 4 Orbital characteristics 1 Epoch 4 September 2017 JD 2458000 5 Uncertainty parameter 0Observation arc91 06 yr 33 260 days Aphelion2 8555 AUPerihelion2 4804 AUSemi major axis2 6680 AUEccentricity0 0703Orbital period sidereal 4 36 yr 1 592 days Mean anomaly0 0836 Mean motion0 13m 34 32s dayInclination11 315 Longitude of ascending node355 75 Argument of perihelion311 34 Physical characteristicsDimensions11 783 0 296 km 6 12 048 0 146 km 7 26 52 km calculated 3 Synodic rotation period2 94 0 06 h 8 Geometric albedo0 10 assumed 3 a 0 4512 0 0298 7 0 462 0 061 6 Spectral typeS C assumed 3 a Absolute magnitude H 11 0 1 3 11 1 7 11 42 0 31 9 Contents 1 Orbit and classification 2 Physical characteristics 2 1 Rotation period 2 2 Diameter and albedo 3 Naming 4 Notes 5 References 6 External linksOrbit and classification EditGaea is a member of the small Aeria family 539 4 named after its parent body 369 Aeria 11 23 It orbits the Sun in the central main belt at a distance of 2 5 2 9 AU once every 4 years and 4 months 1 592 days Its orbit has an eccentricity of 0 07 and an inclination of 11 with respect to the ecliptic 1 The body s observation arc begins at Heidelberg in November 1925 more than 2 months after its official discovery observation 10 Physical characteristics EditThe asteroid s spectral type is unknown The LCDB assumes a stony S or carbonaceous C composition to be equally likely a while the overall spectral type for members of the Aeria family is that of an X type 11 23 The high albedo figures obtained from observations with the WISE telescope do not agree with neither of these spectral types see below 7 Rotation period Edit In January 2011 a rotational lightcurve of Gaea was obtained from photometric observations by French amateur astronomer Rene Roy Lightcurve analysis gave a short rotation period of 2 94 hours with a brightness amplitude of 0 09 magnitude U 2 8 A low brightness amplitude also indicates that the body might have a spheroidal rather than an irregular shape Diameter and albedo Edit According to the survey carried out by the NEOWISE mission of NASA s Wide field Infrared Survey Explorer Gaea measures 11 783 and 12 048 kilometers in diameter and its surface has a high albedo of 0 462 and 0 4512 respectively 6 7 The Collaborative Asteroid Lightcurve Link assumes an albedo of 0 10 a compromise value between the stony 0 20 and carbonaceous 0 057 asteroids both found abundantly in this region of the asteroid belt and consequently calculates a much larger diameter of 26 52 kilometers based on an absolute magnitude of 11 0 3 Naming EditThis minor planet was named after Gaia or Gaea the goddess of Earth in Greek mythology Her son and husband was Uranus the god of the sky Uranus and Gaia were the parents of the first generation of Titans six males and six females and the ancestors of most of the Greek gods The asteroid s name was proposed by German ARI astronomer Gustav Stracke after whom the asteroid 1019 Strackea was named 2 Notes Edit a b c Generic stony carbonaceous composition with a compromise albedo of 0 10 for asteroids with an semi major axis of 2 6 2 7 AU according to LCDB s 2 Taxonomic Class orbital class and albedoReferences Edit a b c d JPL Small Body Database Browser 1184 Gaea 1926 RE 2017 09 27 last obs Jet Propulsion Laboratory Retrieved 24 October 2017 a b c Schmadel Lutz D 2007 1184 Gaea Dictionary of Minor Planet Names 1184 Gaea Springer Berlin Heidelberg p 99 doi 10 1007 978 3 540 29925 7 1185 ISBN 978 3 540 00238 3 a b c d e f LCDB Data for 1184 Gaea Asteroid Lightcurve Database LCDB Retrieved 24 October 2017 a b Asteroid 1184 Gaea Nesvorny HCM Asteroid Families V3 0 Small Bodies Data Ferret Retrieved 26 October 2019 Gaea Merriam Webster Dictionary 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 24 October 2017 a b c d e 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 Behrend Raoul Asteroids and comets rotation curves 1184 Gaea Geneva Observatory Retrieved 24 October 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 24 October 2017 a b 1184 Gaea 1926 RE Minor Planet Center Retrieved 24 October 2017 a b Nesvorny 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 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 1184 Gaea at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 1184 Gaea 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 1184 Gaea amp oldid 1126710264, wikipedia, wiki, book, books, library,

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