17365 Thymbraeus
{{Short description|Jupiter trojan asteroid}}
{{Use dmy dates|date=November 2023}}
{{Infobox planet
| minorplanet = yes
| name = 17365 Thymbraeus
| background = #C2FFFF
| image =
| image_size =
| caption =
| discoverer = Eleanor F. Helin
Schelte J. Bus
| discovery_site = Palomar Obs.
| discovered = 7 November 1978
| mpc_name = (17365) Thymbraeus
| alt_names = {{mp|1978 VF|11}}{{·}}{{mp|1998 MM|49}}{{·}}{{mp|1999 RE|121}}
| pronounced =
| named_after =
| mp_category = Jupiter trojan
Trojan ({{L5}})
| epoch = 13 September 2023 (JD 2460200.5)
| uncertainty = 0
| observation_arc = 68.79 yr (25,125 days)
| earliest_precovery_date = 23 November 1954
| aphelion = 5.683 AU
| perihelion = 4.856 AU
| semimajor = 5.270 AU
| eccentricity = 0.0785
| period = 12.10 yr (4,418 days)
| mean_anomaly = 321.875°
| mean_motion = {{Deg2DMS|0.0814780|sup=ms}} / day
| inclination = 11.644°
| asc_node = 252.124°
| arg_peri = 117.711°
| physical_ref = {{rp|page=3}}
| dimensions =
| mean_diameter = {{val|44.904|0.525|u=km}}
| mass =
| density = {{val|0.830|0.050|u=g/cm3}}{{rp|page=3}}
| rotation = {{val|12.671821|u=h}} (retrograde)
or {{val|12.672607|u=h}} (prograde){{rp|page=3}}
| right_asc_north_pole = {{val|92|2|u=°}} (retrograde)
or {{val|268|2|u=°}} (prograde){{rp|page=3}}
| declination = {{val|-77|2|u=°}} (retrograde)
or +{{val|77|2|u=°}} (prograde){{rp|page=3}}
| axial_tilt =
| albedo = {{val|0.066|0.009}}
| spectral_type =
| abs_magnitude = {{val|10.59|0.04}}
}}
17365 Thymbraeus (provisional designation {{mp|1978 VF|11}}) is a Jupiter trojan from the Trojan camp, which is located in Jupiter's trailing {{L5}} Lagrangian point.
Background
It was discovered by Eleanor Helin and Schelte Bus at Palomar Observatory on 7 November 1978. Thymbraeus is {{convert|45|km|mi}} in diameter and has an elongated dumbbell shape that is on the verge of splitting apart due to centrifugal forces of its rapid rotation. The asteroid's density is less than that of water, indicating that it has a highly porous interior structure similar to a rubble pile. It was given the name Thymbraeus on 27 February 2023, after one of the two sons of the Trojan priest Laocoön who was attacked by sea serpents for attempting to warn the Trojans about the Trojan horse in Greek mythology.
References
{{reflist|refs=
|type = 2023-09-07 last obs.
|title = JPL Small-Body Database Browser: 17365 Thymbraeus (1978 VF11)
|url = https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20017365
|publisher = Jet Propulsion Laboratory
|accessdate = 4 November 2023}}
|title = (17365) Thymbraeus = 1998 MM49 = 1978 VF11 = 1999 RE121
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=17365
|publisher = Minor Planet Center
|accessdate = 4 November 2023}}
|title = List of Jupiter Trojans
|url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html
|publisher = Minor Planet Center
|date = 26 September 2023
|accessdate = 4 November 2023}}
|title = WGSBN Bulletin 3, #3
|url = https://www.wgsbn-iau.org/files/Bulletins/V003/WGSBNBull_V003_003.pdf
|journal = WGSBN Bulletin
|publisher = International Astronomical Union
|volume = 3
|issue = 3
|pages = 22
|date = 27 February 2023
|accessdate = 4 November 2023}}
|first1 = Rita K. |last1 = Mann
|first2 = David |last2 = Jewitt
|first3 = Pedro |last3 = Lacerda
|title = Fraction of Contact Binary Trojan Asteroids
|journal = The Astronomical Journal
|date = September 2007
|volume = 134
|issue = 3
|pages = 1133–1144
|doi-access = free
|doi = 10.1086/520328
|arxiv = 0706.0233
|bibcode = 2007AJ....134.1133M}}
|first1 = K. S. |last1 = Noll
|first2 = S. D. |last2 = Benecchi
|first3 = E. L. |last3 = Ryan
|first4 = W. M. |last4 = Grundy
|title = Ultra-Slow Rotating Outer Main Belt and Trojan Asteroids: Search for Binaries
|url = https://www.hou.usra.edu/meetings/lpsc2014/pdf/1703.pdf
|conference = 45th Lunar and Planetary Science Conference
|location = The Woodlands, Texas
|date = March 2014
|volume = 45
|issue = 1777
|page = 1703
|bibcode = 2014LPI....45.1703N}}
|display-authors = etal
|first1 = B. |last1 = Carry
|first2 = P. |last2 = Descamps
|first3 = M. |last3 = Ferrais
|first4 = J.-P. |last4 = Rivet
|first5 = J. |last5 = Berthier
|first6 = E. |last6 = Jehin
|title = Close-to-fission dumbbell Jupiter-Trojan (17365) Thymbraeus
|journal = Astronomy & Astrophysics
|date = 2023
|volume = 680
|id =
|pages = 6
|doi-access =
|doi = 10.1051/0004-6361/202347158
|arxiv = 2309.15537
|bibcode = 2023A&A...680A..21C}}
}}
External links
- {{AstDys|17365}}
- {{JPL small body}}
{{Minor planets navigator| |number=17365| }}
{{Small Solar System bodies}}
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Category:Jupiter trojans (Trojan camp)
Category:Discoveries by Eleanor F. Helin