17314 Aisakos

From Wikipedia, the free encyclopedia
17314 Aisakos
Discovery [1]
Discovered byC. J. van Houten
I. van Houten-G.
T. Gehrels
Discovery sitePalomar Obs.
Discovery date25 March 1971
Designations
(17314) Aisakos
Pronunciation/ˈeɪsəkəs/[5]
Named after
Aesacus [1]
(Greek mythology)
1024 T-1 · 1977 RS9
1989 RH3 · T/1024 T-1
Minor planet category
Jupiter trojan [1][2]
Trojan [3] · background [4]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc63.26 yr (23,105 d)
Aphelion5.5517 AU
Perihelion4.7796 AU
5.1656 AU
Eccentricity0.0747
11.74 yr (4,288 d)
81.097°
0° 5m 2.04s / day
Inclination10.724°
353.79°
85.781°
Jupiter MOID0.1647 AU
TJupiter2.9600
Physical characteristics
Mean diameter
35.76±0.38 km[6]
36.78 km (calculated)[7]
9.67±0.02 h[8][a]
0.057 (assumed)[7]
0.072±0.018[6]
C (assumed)[7]
Absolute magnitude (H)
10.70[6]
10.9[1][2][7]

17314 Aisakos /ˈeɪsəkəs/ is a Jupiter trojan from the Trojan camp, approximately 36 kilometers (22 miles) in diameter. It was discovered at the Palomar Observatory during the first Palomar–Leiden Trojan survey in 1971. The dark Jovian asteroid has a rotation period of 9.7 hours.[7] It was named after the Trojan prince Aesacus from Greek mythology.[1]

Discovery[]

Aisakos was discovered on 25 March 1971, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Dutch–American astronomer Tom Gehrels at Palomar Observatory in the Palomar Mountain Range, southeast of Los Angeles.[1] The body's observation arc begins with a precovery taken at Palomar in November 1954, more than 16 years prior to its official discovery observation.[1]

Palomar–Leiden Trojan survey[]

The survey designation "T-1" stands for the first Palomar–Leiden Trojan survey, named after the fruitful collaboration of the Palomar and Leiden Observatory in the 1960s and 1970s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis van Houten at Leiden Observatory where astrometry was carried out. The trio are credited with the discovery of several thousand asteroids.[9]

Naming[]

This minor planet was named from Greek mythology after the Trojan prince Aesacus (Aisakos), son of King Priam and his first wife Arisbe. As had been his maternal grandfather Merops, he was a seer and foresaw the downfall of Troy, brought upon by Hecuba's future son, Paris.[1] The official naming citation was published by the Minor Planet Center on 9 March 2001 (M.P.C. 42365).[10]

Orbit and classification[]

Aisakos is a Jupiter trojan 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).[3] It is also a non-family asteroid in the Jovian background population.[4] It orbits the Sun at a distance of 4.8–5.6 AU once every 11 years and 9 months (4,288 days; semi-major axis of 5.17 AU). Its orbit has an eccentricity of 0.07 and an inclination of 11° with respect to the ecliptic.[2]

Physical characteristics[]

Aisakos is an assumed C-type asteroid, while most larger Jupiter trojans are D-types.[7]

Rotation period[]

In October 2014, a rotational lightcurve of Aisakos was obtained from photometric observations over three consecutive nights by Robert Stephens at the Center for Solar System Studies in Landers, California. Lightcurve analysis gave a well-defined rotation period of 9.67±0.02 hours with a brightness amplitude of 0.34 magnitude (U=3).[8][a]

Diameter and albedo[]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Aisakos measures 35.76 kilometers in diameter and its surface has an albedo of 0.072,[6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 36.78 kilometers based on an absolute magnitude of 10.9.[7]

100+ largest Jupiter trojans

Notes[]

  1. ^ Jump up to: a b Lightcurve plots of (17314) Aisakos from Oct 2014 by Robert Stephens at the Center for Solar System Studies (U81). Quality code is 3- (lightcurve rating at CS3). Summary figures at the LCDB and CS3.

References[]

  1. ^ Jump up to: a b c d e f g h "17314 Aisakos (1024 T-1)". Minor Planet Center. Retrieved 4 July 2018.
  2. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 17314 Aisakos (1024 T-1)" (2018-02-25 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2018.
  3. ^ Jump up to: a b "List of Jupiter Trojans". Minor Planet Center. 1 July 2018. Retrieved 4 July 2018.
  4. ^ Jump up to: a b "Asteroid (17314) Aisakos – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 4 July 2018.
  5. ^ 'Aesacus' in Noah Webster (1884) A Practical Dictionary of the English Language, with long vowel retained due to 'ai' spelling
  6. ^ 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. Retrieved 4 July 2018. (online catalog)
  7. ^ Jump up to: a b c d e f g "LCDB Data for (17314) Aisakos". Asteroid Lightcurve Database (LCDB). Retrieved 4 July 2018.
  8. ^ Jump up to: a b Stephens, Robert D.; Coley, Daniel R.; French, Linda M. (July 2015). "Dispatches from the Trojan Camp - Jovian Trojan L5 Asteroids Observed from CS3: 2014 October - 2015 January". The Minor Planet Bulletin. 42 (3): 216–224. Bibcode:2015MPBu...42R.216S. ISSN 1052-8091. Retrieved 4 July 2018.
  9. ^ "Minor Planet Discoverers". Minor Planet Center. 2018. Retrieved 4 July 2018.
  10. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 July 2018.

External links[]

Retrieved from ""