15436 Dexius

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15436 Dexius
Discovery [1]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date10 November 1998
Designations
(15436) Dexius
Named after
Dexius
(Greek mythology)[2]
1998 VU30 · 1962 WO
2000 AS81
Minor planet category
Jupiter trojan [1][3][4]
Greek [5][6] · background [6]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc54.93 yr (20,063 d)
Aphelion5.4369 AU
Perihelion4.9840 AU
5.2104 AU
Eccentricity0.0435
11.89 yr (4,344 d)
215.97°
0° 4m 58.44s / day
Inclination16.264°
253.43°
179.02°
Jupiter MOID0.094 AU
TJupiter2.9180
Physical characteristics
Mean diameter
78.63±2.20 km[7]
85.71±10.2 km[8]
86.00 km (derived)[4]
87.65±0.77 km[9]
8.970±0.003 h[10][a]
8.97±0.01 h[11][b]
0.0381±0.011[8]
0.046±0.003[7]
0.053±0.005[9]
0.0547 (derived)[4]
C (assumed)[4]
V–I = 0.870±0.052[4]
Absolute magnitude (H)
9.1[1][3][4][9]
9.28±0.37[12]
9.50[7][8][13]

15436 Dexius, provisional designation: 1998 VU30, is a large Jupiter trojan from the Greek camp, approximately 86 kilometers (53 miles) in diameter. It was discovered on 10 November 1998, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.[1] The presumed C-type asteroid has a rotation period of 8.97 hours.[4] It is one of the 50 largest Jupiter trojans and was named after , father of Iphinous from Greek mythology.[1][14] [2]

Orbit and classification[]

Dexius is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of its orbit in a 1:1 resonance (see Trojans in astronomy). It is a non-family asteroid in the Jovian background population.[6][13] It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 11 months (4,344 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.04 and an inclination of 16° with respect to the ecliptic.[3]

The body's observation arc begins with its first observation as 1962 WO at the Goethe Link Observatory in November 1962, or 36 years prior to its official discovery observation at Socorro.[1]

Numbering and naming[]

This minor planet was numbered on 21 June 2000 (M.P.C. 40826).[15] On 14 May 2021, the object was named by the Working Group Small Body Nomenclature (WGSBN), after , father of Iphinous from Greek mythology.[2]

Physical characteristics[]

Dexius is a generically assumed C-type asteroid.[4]

Rotation period[]

In 2013 and 2014, two rotational lightcurves of Dexius were obtained from photometric observations by Robert Stephens at the Trojan Station of Center for Solar System Studies (U81) in Landers, California. Lightcurve analysis gave an identical rotation period of 8.97 hours with a brightness amplitude of 0.15 and 0.29 magnitude, respectively (U=3/3).[4][10][11][a][b]

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), this Jovian trojan measures between 78.63 and 87.65 kilometers in diameter and its surface has an albedo between 0.038 and 0.053.[7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0547 and a diameter of 86.00 kilometers based on an absolute magnitude of 9.1.[4]

It belongs to the 50 largest Jupiter trojan and is currently the largest such body without a name, slightly larger than (4489) 1988 AK based on WISE-data.[14]

100+ largest Jupiter trojans

Notes[]

  1. ^ Jump up to: a b Lightcurve plot of (15436) 1998 VU30 from 2014 by Robert D. Stephens at the Center for Solar System Studies (U81). Rotation period 8.970±0.003 hours with a brightness amplitude of 0.18 mag. Quality code is 3 or 3-. Summary figures at the LCDB.
  2. ^ Jump up to: a b Lightcurve plot of (15436) 1998 VU30 from 2013 by Robert D. Stephens at the Center for Solar System Studies (U81). Rotation period 8.97±0.01 hours. Quality code is 3. Summary figures at the LCDB.

References[]

  1. ^ Jump up to: a b c d e f "15436 (1998 VU30)". Minor Planet Center. Retrieved 30 May 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: 15436 (1998 VU30)" (2017-10-29 last obs.). Jet Propulsion Laboratory. Retrieved 30 May 2018.
  4. ^ Jump up to: a b c d e f g h i j "LCDB Data for (15436)". Asteroid Lightcurve Database (LCDB). Retrieved 30 May 2018.
  5. ^ "List of Jupiter Trojans". Minor Planet Center. 2 February 2018. Retrieved 30 May 2018.
  6. ^ Jump up to: a b c "Asteroid (15436) 1998 VU30". AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 May 2018.
  7. ^ 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)
  8. ^ Jump up to: 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 – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 15 June 2018.
  9. ^ 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)
  10. ^ Jump up to: a b Stephens, Robert D.; Coley, Daniel R.; Warner, Brian D.; French, Linda, M. (October 2016). "Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies". The Minor Planet Bulletin. 43 (4): 323–331. Bibcode:2016MPBu...43..323S. ISSN 1052-8091.
  11. ^ Jump up to: a b French, Linda M.; Stephens, Robert, D.; Coley, Daniel R.; Wasserman, Lawrence H.; Vilas, Faith; La Rocca, Daniel (October 2013). "A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids". The Minor Planet Bulletin. 40 (4): 198–203. Bibcode:2013MPBu...40..198F. ISSN 1052-8091.
  12. ^ 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. S2CID 53493339.
  13. ^ Jump up to: a b "Asteroid (15436) 1998 VU30". Small Bodies Data Ferret. Retrieved 30 May 2018.
  14. ^ Jump up to: a b "JPL Small-Body Database Browser: Jupiter trojans larger than 50 kilometers". Jet Propulsion Laboratory. Retrieved 30 May 2018.
  15. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 May 2018.

External links[]

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