12929 Periboea

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12929 Periboea
Discovery [1]
Discovered byC. W. Juels
Discovery siteFountain Hills Obs.
Discovery date2 October 1999
Designations
(12929) Periboea
Named after
Periboea
(Greek mythology)[2]
1999 TZ1 · 1992 CF6
Minor planet category
Jupiter trojan [1][3]
Trojan [4] · background [5]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc64.68 yr (23,624 d)
Aphelion5.4426 AU
Perihelion5.0325 AU
5.2376 AU
Eccentricity0.0392
11.99 yr (4,378 d)
213.65°
0° 4m 55.92s / day
Inclination43.453°
200.23°
130.28°
Jupiter MOID0.0947 AU
TJupiter2.4490
Physical characteristics
Mean diameter
51.5±5 km[6]
54.08±0.62 km[7]
55.34±4.04 km[8]
9.2749±0.0016 h[9]
0.053±0.012[6]
0.066±0.011[7]
0.110±0.017[8]
C (assumed)[10]
B–V = 0.830±0.060[11]
V–R = 0.460±0.040[11]
V–I = 0.880±0.031[10]
Absolute magnitude (H)
9.30[8]
9.792±0.025 (R)[6]
9.9[1][3][7]

12929 Periboea, provisional designation: 1999 TZ1, is a dark Jupiter trojan from the Trojan camp, approximately 54 kilometers (34 miles) in diameter. It was discovered on 2 October 1999, by American astronomer Charles W. Juels at the Fountain Hills Observatory in Arizona.[1] Originally considered a centaur, this now re-classified Jovian asteroid has a rotation period of 9.3 hours and belongs to the 80 largest Jupiter trojans.[10] It was named from Greek mythology after Periboea, mother of Pelagon by the river-god Axius.[2]

Orbit and classification[]

Periboea is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's L5 Lagrangian point, 60° behind its orbit (see Trojans in astronomy).[4] It is also a non-family asteroid of the Jovian background population.[5]

It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 12 months (4,378 days; semi-major axis of 5.24 AU). Its orbit has an eccentricity of 0.04 and a high inclination of 43° with respect to the ecliptic.[3] The body's observation arc begins with a precovery taken at Palomar Observatory in September 1953, or 46 years prior to its official discovery observation at Fountain Hills.[1]

Classification as centaur[]

Periboea was originally listed by the Minor Planet Center (MPC) as a centaur. However, its location close to L5, its low albedo and spectral slope, as well as its estimated dynamical lifetime of more than a billion years, led to the conclusion that the formerly classified centaur is indeed a Jupiter trojan.[6]

Numbering and naming[]

This minor planet was numbered by the MPC on 22 December 1999 (M.P.C. 22480).[12] On 14 May 2021, the object was named by the Working Group Small Body Nomenclature (WGSBN), after Periboea, a mortal woman and eldest daughter of Acessamenus from Greek mythology. Periboea was the mother of Pelagon who she conceived by way of the river god Axius. Her grandson was the Trojan ally Asteropaios.[2]

Physical characteristics[]

Periboea is an assumed C-type asteroid. It has a V–I color index of 0.88.[10]

Rotation period[]

In 2007, four rotational lightcurves of Periboea have been obtained from photometric observations with a period of 10.4 and 10.422 hours (U=2/2/2/2-).[6][13][14][15] Best-rated lightcurve, obtained by Stefano Mottola at the Calar Alto Observatory over seven nights from May to June 2009, gave a rotation period of 9.2749±0.0016 hours with a brightness amplitude of 0.17 magnitude (U=2+).[9][10]

Diameter and albedo[]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, and observations by French and Spanish astronomers, Periboea measures between 51.5 and 55.34 kilometers in diameter and its surface has an albedo between 0.053 and 0.110.[6][7][8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of a carbonaceous asteroid 0.057 and calculates a diameter of 61.04 kilometers based on an absolute magnitude of 9.8.[10]

100+ largest Jupiter trojans

References[]

  1. ^ Jump up to: a b c d e "12929 (1999 TZ1)". Minor Planet Center. Retrieved 19 June 2018.
  2. ^ Jump up to: a b c "WGSBN Bulletin Archive". Working Group Small Body Nomenclature. 14 May 2021. Retrieved 16 May 2021. (Bulletin #1)
  3. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 12929 (1999 TZ1)" (2018-05-22 last obs.). Jet Propulsion Laboratory. Retrieved 19 June 2018.
  4. ^ Jump up to: a b "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 19 June 2018.
  5. ^ Jump up to: a b "Asteroid (12929) 1999 TZ1 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 19 June 2018.
  6. ^ Jump up to: a b c d e f Moullet, A.; Lellouch, E.; Doressoundiram, A.; Ortiz, J. L.; Duffard, R.; Morbidelli, A.; et al. (May 2008). "Physical and dynamical properties of (12929) 1999 TZ{1} suggest that it is a Trojan" (PDF). Astronomy and Astrophysics. 483 (2): L17–L20. Bibcode:2008A&A...483L..17M. doi:10.1051/0004-6361:200809474. Retrieved 19 June 2018.
  7. ^ Jump up to: a b c d Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. S2CID 119101711. (online catalog)
  8. ^ Jump up to: 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. ^ Jump up to: a b Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170.
  10. ^ Jump up to: a b c d e f "LCDB Data for (12929)". Asteroid Lightcurve Database (LCDB). Retrieved 19 June 2018.
  11. ^ Jump up to: a b Chatelain, Joseph P.; Henry, Todd J.; French, Linda M.; Winters, Jennifer G.; Trilling, David E. (June 2016). "Photometric colors of the brightest members of the Jupiter L5 Trojan cloud". Icarus. 271: 158–169. Bibcode:2016Icar..271..158C. doi:10.1016/j.icarus.2016.01.026.
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 June 2018.
  13. ^ Perna, Davide; Dotto, E.; Barucci, A.; Rossi, A.; de Bergh, C.; Doressoundiram, A.; et al. (September 2008). "Light Curves and Densities of Centaurs and Trans-Neptunian Objects from the ESO Large Program". American Astronomical Society. 40: 483. Bibcode:2008DPS....40.4708P.
  14. ^ Dotto, E.; Perna, D.; Barucci, M. A.; Rossi, A.; de Bergh, C.; Doressoundiram, A.; et al. (November 2008). "Rotational properties of Centaurs and Trans-Neptunian Objects. Lightcurves and densities". Astronomy and Astrophysics. 490 (2): 829–833. Bibcode:2008A&A...490..829D. doi:10.1051/0004-6361:200809615.
  15. ^ Thirouin, A.; Ortiz, J. L.; Duffard, R.; Santos-Sanz, P.; Aceituno, F. J.; Morales, N. (November 2010). "Short-term variability of a sample of 29 trans-Neptunian objects and Centaurs". Astronomy and Astrophysics. 522: 43. arXiv:1004.4841. Bibcode:2010A&A...522A..93T. doi:10.1051/0004-6361/200912340. S2CID 54039561.

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