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WASP-94#Planetary system

{{Starbox begin}}

{{Starbox observe 2s

| epoch = J2000

| constell = Microscopium

| component1 = A

| ra1 = {{RA|20|55|07.94435}}

| dec1 = {{DEC|-34|08|08.0075}}

| appmag_v1 = 10.1

| component2 = B

| ra2 = {{RA|20|55|09.15767}}

| dec2 = {{DEC|-34|08|07.9138}}

| appmag_v2 = 10.5

}}

{{Starbox character

| component1 = A

| type = main sequence

| class = F8

| component2 = B

| type2 = subgiant

| class2 = F9

}}

{{Starbox astrometry

| component1 = A

| radial_v = {{val|-8.36|0.19}}

| prop_mo_ra = +26.500

| prop_mo_dec = −44.971

| pm_footnote =

| parallax = 4.7498

| p_error = 0.0242

| parallax_footnote =

| component2 = B

| radial_v2 = {{val|-8.30|0.20}}

| prop_mo_ra2 = +26.191

| prop_mo_dec2 = −44.702

| pm_footnote2 =

| parallax2 = 4.7208

| p_error2 = 0.0165

| parallax_footnote2 =

}}

{{Starbox detail

| source =

| component1 = A

| mass = {{val|1.45|0.09}}

| radius = {{val|1.62|0.05|0.04}}

| luminosity = 3.2

| gravity = {{val|4.21|0.011}}

| temperature = {{val|6194|5}}

| metal_fe = {{val|+0.320|0.004}}

| rotation = 19.5 d

| rotational_velocity = {{val|4.2|0.5}}

| age_gyr = 2.3–2.8

| component2 = B

| mass2 = {{val|1.24|0.09}}

| radius2 = {{val|1.35|0.12}}

| luminosity2 = 2.2

| gravity2 = {{val|4.30|0.015}}

| temperature2 = {{val|6112|6}}

| metal_fe2 = {{val|+0.305|0.005}}

| rotation2 = >45.5 d

| rotational_velocity2 = <1.5

| age_gyr2 = 2.3–2.8

}}

{{Starbox catalog

| names = {{odlist | CD=-34 14724 | WASP=94}}, HJ 5234

| component1 = A

| names1 = {{odlist | 2MASS=J20550794-3408079 | TIC=92352620 | TOI=107 | TYC=7466-1400-1}}

| component2 = B

| names2 = {{odlist | 2MASS=J20550915-3408078 | TIC=92352621}}

}}

{{Starbox reference

| Simbad = WASP-94A | sn=A

| Simbad2 = WASP-94B | sn2=B

| NSTED = WASP-94

}}

{{Starbox end}}

WASP-94 is a binary star system located about {{convert|690|ly|pc|lk=on|abbr=off}} away in the constellation Microscopium. It consists of two F-type stars separated by {{val|15|ul=arcsec}}, corresponding to a projected separation of {{val|2700|ul=au}}. Both stars are known to host exoplanets.

The binary system was first observed by John Herschel in 1834 and catalogued as HJ 5234. The designation WASP-94 comes from the Wide Angle Search for Planets, and has been used since the system was found to host planets in 2014. While the two stars have similar spectral types, they differ in elemental abundance{{snd}}WASP-94A has fewer volatile elements and more refractory elements than WASP-94B.

Planetary system

The two stars host a single known planet each. Both are hot Jupiters, gas giant planets completing orbits around their stars in just a few days.

File:WASP-94 diagram.png

WASP-94Ab transits its host star, and it has also been detected by the radial velocity method. As a result, both its size and mass are known, which show that it is a low-density planet with a highly inflated radius. It has an equilibrium temperature of {{val|1508|75|ul=K}}. Its orbit is retrograde and misaligned with the rotation of its host star. The atmosphere of WASP-94Ab appears to be relatively free of clouds, with sodium, water vapor and carbon dioxide being detected.

WASP-94Bb is a non-transiting planet that has been detected only by radial velocity, so it has no measured radius and true mass. Its minimum mass is 62% the mass of Jupiter.

{{Orbitbox planet begin

| name = WASP-94 A

| table_ref =

}}

{{Orbitbox planet

| exoplanet = b

| mass = {{val|0.452|0.035|0.032}}

| radius = {{val|1.72|0.06|0.05}}

| semimajor = {{val|0.055|0.001}}

| period = {{val|3.9501907|0.0000044|0.0000030}}

| eccentricity = <0.064

| inclination = {{val|88.7|0.7}}

}}

{{Orbitbox end}}

{{Orbitbox planet begin

| name = WASP-94 B

| table_ref =

}}

{{Orbitbox planet

| exoplanet = b

| mass = {{val|0.618|0.028|0.029|p=≥}}

| radius =

| semimajor = {{val|0.0335|0.0006|0.0005}}

| period = {{val|2.00839|0.00024}}

| eccentricity = 0

| inclination =

}}

{{Orbitbox end}}

See also

Other systems with multiple planet-hosting stars:

References

{{reflist|refs=

{{cite simbad |title=CD-34 14724A |access-date=18 May 2025}}

{{cite simbad |title=CD-34 14724B |access-date=18 May 2025}}

{{Cite Gaia DR3|6780546169634170496}}

{{Cite Gaia DR3|6780546169633474944}}

{{cite constellation|WASP-94}}

{{cite journal |bibcode=2023ApJS..266....6A |title=In the Trenches of the Solar-Stellar Connection. VII. Wilson-Bappu 2022 |last1=Ayres |first1=Thomas |journal=The Astrophysical Journal Supplement Series |date=2023 |volume=266 |issue=1 |page=6 |doi=10.3847/1538-4365/acb535 |doi-access=free }}

{{cite journal |bibcode=2023ApJS..264...41Y |title=Revised Extinctions and Radii for 1.5 Million Stars Observed by APOGEE, GALAH, and RAVE |last1=Yu |first1=Jie |last2=Khanna |first2=Shourya |last3=Themessl |first3=Nathalie |last4=Hekker |first4=Saskia |last5=Dréau |first5=Guillaume |last6=Gizon |first6=Laurent |last7=Bi |first7=Shaolan |journal=The Astrophysical Journal Supplement Series |date=2023 |volume=264 |issue=2 |page=41 |doi=10.3847/1538-4365/acabc8 |doi-access=free |arxiv=2206.00046 }}

{{cite journal |last1=Neveu-VanMalle |first1=M. |last2=Queloz |first2=D. |display-authors=etal |date=December 2014 |title=WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system |journal=Astronomy & Astrophysics |volume=572 |issue= |pages=A49 |doi=10.1051/0004-6361/201424744 |doi-access=free |arxiv=1409.7566 |bibcode=2014A&A...572A..49N}}

{{cite journal |last1=Teske |first1=Johanna K. |last2=Khanal |first2=Sandhya |last3=Ramírez |first3=Ivan |date=March 2016 |title=The Curious Case of Elemental Abundance Differences in the Dual Hot Jupiter Hosts WASP-94A and B |journal=The Astrophysical Journal |volume=819 |issue=1 |pages=19 |doi=10.3847/0004-637X/819/1/19 |doi-access=free |arxiv=1601.01731 |bibcode=2016ApJ...819...19T}}

{{cite journal |last1=Bonomo |first1=A. S. |last2=Desidera |first2=S. |display-authors=etal |date=June 2017 |title=The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets |journal=Astronomy & Astrophysics |volume=602 |issue= |pages=A107 |doi=10.1051/0004-6361/201629882 |doi-access=free |arxiv=1704.00373 |bibcode=2017A&A...602A.107B}}

{{cite journal |last1=Ahrer |first1=E. |last2=Wheatley |first2=P. J. |display-authors=etal |date=March 2022 |title=LRG-BEASTS: Sodium absorption and Rayleigh scattering in the atmosphere of WASP-94A b using NTT/EFOSC2 |journal=Monthly Notices of the Royal Astronomical Society |volume=510 |issue=4 |pages=4857-4871 |doi=10.1093/mnras/stab3805 |doi-access=free |arxiv=2201.02212 |bibcode=2022MNRAS.510.4857A}}

{{cite journal |last1=Ahrer |first1=E. |last2=Seidel |first2=J. V. |display-authors=etal |date=May 2024 |title=Atmospheric characterization and tighter constraints on the orbital misalignment of WASP-94 A b with HARPS |journal=Monthly Notices of the Royal Astronomical Society |volume=530 |issue=3 |pages=2749-2759 |doi=10.1093/mnras/stae1000 |doi-access=free |arxiv=2404.06550 |bibcode=2024MNRAS.530.2749A}}

{{cite journal |last1=Ahrer |first1=Eva-Maria |last2=Gandhi |first2=Siddharth |display-authors=etal |date=May 2025 |title=Tracing the formation and migration history: molecular signatures in the atmosphere of misaligned hot Jupiter WASP-94Ab using JWST NIRSpec/G395H |journal=Monthly Notices of the Royal Astronomical Society |volume= |issue= |pages= |doi=10.1093/mnras/staf819 |doi-access=free |arxiv=2505.11224}}

}}

{{Microscopium}}

Category:Microscopium

Category:Binary stars

Category:F-type main-sequence stars

Category:Planetary systems with two confirmed planets

CD-34 14724

92352620

0107

094

Category:Astronomical objects discovered in 1834

Category:F-type subgiants