WISE 1800+0134

Brown dwarf in the constellation Ophiuchus

WISEP J180026.60+013453.1
Observation data Epoch 2010.22^[1] Equinox J2000^[1]
Constellation	Ophiuchus
Right ascension	18^h 00^m 26.60^s^[1]
Declination	01° 34′ 53.1″^[1]
Characteristics
Spectral type	L7.5^[1]
Apparent magnitude (J (2MASS filter system))	14.30 ± 0.04^[1]
Apparent magnitude (H (2MASS filter system))	13.12 ± 0.04^[1]
Apparent magnitude (K_S (2MASS filter system))	12.42 ± 0.03^[1]
Astrometry

Proper motion (μ)	RA: 183.734^[2] mas/yr Dec.: -384.108^[2] mas/yr
Parallax (π)	128.0546 ± 0.5101 mas^[2]
Distance	25.5 ± 0.1 ly (7.81 ± 0.03 pc)

Details

Mass	0.045±0.015^[3] `M`_☉
Luminosity	10^{−4.53 ± 0.04}^[3] `L`_☉
Temperature	1430 ± 100^[1] K
Rotation	9.3 hours^[3]
Rotational velocity (v sin i)	13.5±0.5^[3] km/s
Age	0.9±0.6^[3] Gyr

Other designations
WISEP J180026.60+013453.1^[1] W1800+0134^[1] 2MASS J18002648+0134565^[1] DENIS J180026.4+013457^[1] DENIS-P J180026.4+013457^[4]
Database references
SIMBAD	data

WISEP J180026.60+013453.1 (designation is abbreviated to W1800+0134^[1]) is a brown dwarf of spectral class L7.5,^[1] located in constellation Ophiuchus at approximately 26 light-years from Earth.^[1]

Discovery

WISEP J180026.60+013453.1 was discovered in 2011 by Gizis et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 centimetres (16 in)) space telescope, which mission lasted from December 2009 to February 2011. There are also precovery identifications of this object in Two Micron All-Sky Survey (2MASS) data (observed on 2000 September 23) and in the 3rd release of the DENIS database (close in time to the 2MASS observation).^[1] On 2011 June 22 Gizis et al. had conducted near-infrared spectroscopy with SpeX spectrograph, mounted on the 3 m Infrared Telescope Facility (IRTF), located at the Mauna Kea Observatory in Hawaii.^[1] In 2011 Gizis et al. published a paper in The Astronomical Journal, where they presented discovery of a newfound by WISE L-type brown dwarf WISEP J180026.60+013453.1 (a single discovery, presented in the article).^[1]

Physical properties

WISEP J180026.60+013453.1 has temperature 1430 ± 100 K and luminosity 10^{−4.5 ± 0.3} Solar luminosities (the estimates are based on the object's spectral class (L7.5)).^[1] Mass estimates, determined from this temperature, are 0.04,^{[note 1]} 0.05,^{[note 2]} and 0.074^{[note 3]} Solar masses, anyway below the hydrogen-burning limit, which implies that WISEP J180026.60+013453.1 is not a true star, but only a substellar object, that is a brown dwarf.^[1]

Failed test for binarity

WISEP J180026.60+013453.1 was tested spectroscopically for L + T binarity, and the binarity was not revealed.^[1] Common proper motion companions also were not found.^[1]

Notes

^ For an assumed age 0.5 Gyr.
^ For an assumed age 1 Gyr.
^ For an assumed age 5 Gyr.

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w Gizis, John E.; Burgasser, Adam J.; Faherty, Jacqueline K.; Castro, Philip J.; Shara, Michael M. (2011). "WISEP J180026.60+013453.1: A nearby late-L Dwarf near the Galactic Plane". The Astronomical Journal. 142 (5): 171. arXiv:1109.0054. Bibcode:2011AJ....142..171G. doi:10.1088/0004-6256/142/5/171. S2CID 118596629.
^ ^a ^b ^c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ ^a ^b ^c ^d ^e Gizis, John E.; et al. (2015). "Properties of the Nearby Brown Dwarf WISEP J180026.60+013453.1". The Astronomical Journal. 150 (6). 179. arXiv:1509.04690. Bibcode:2015AJ....150..179G. doi:10.1088/0004-6256/150/6/179. S2CID 118641133.
^ "WISEP J180026.60+013453.1 -- Brown Dwarf (M<0.08solMass)". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-12-24.

Constellation of Ophiuchus

Stars

Bayer	α (Rasalhague) β (Cebalrai) γ δ (Yed Prior) ε (Yed Posterior) ζ (Han) η (Sabik) θ ι κ λ (Marfik) μ ν ξ ο ρ σ τ υ φ χ ψ ω
Flamsteed	12 14 15 16 18 19 20 21 23 24 26 28 29 30 31 36 (A, Guniibuu) 37 38 41 43 44 (b) 45 (d, θ Tel) 50 51 (c) 52 53 (f) 54 58 61 66 67 68 70 (p) 71 72 73 74 24 Sco
Variable	U V X Y RS RV RZ ST SW TT TW UU WZ XX BF IX KK V380 V426 V438 V442 V445 V451 V453 V502 V508 V566 V567 V716 V839 V841 V849 V986 V1010 V1054 V2051 V2052 V2076 V2105 V2112 V2113 V2114 V2118 V2126 V2129 V2213 V2214 V2247 V2291 V2292 V2293 V2295 V2301 V2306 V2307 V2324 V2368 V2388 V2393 V2400 V2487 V2500 (Barnard's Star) V2502 V2540 V2542
HR	5989 5990 6041 6067 6096 6124 6136 6137 6140 6144 6179 6189 6190 6193 6201 6202 6235 6248 6269 6284 6294 6296 6302 6308 6329 6340 6350 6353 6354 6358 6359 6361 6365 6367 6372 6375 6387 6390 6404 6413 6428 6433 6435 6439 6441 6465 6472 6473 6474 6476 6489 6490 6494 6497 6504 6507 6512 6516 6520 6521 6524 6532 6534 6575 6577 6578 6590 6593 6601 6633 6639 6650 6659 6667 6670 6686 6689 6690 6696 6706 6719 6784 6797 6800 6851 6857 6883 6902 6925 6976 6985 6987 7010
HD	148390 148427 (Timir) 148531 149143 (Rosalíadecastro) 149382 150052 150381 150433 150493 152581 (Mahsati) 154088 156992 157172 160042 160346 164509 167162 170469 171028
Other	AS 239 BD-9 4395 CFHTWIR-Oph 98 CoRoT-6 CoRoT-25 CoRoT-26 DoAr 21 Elias 2-27 Gaia BH1 Gliese 673 GJ 1207 GJ 1214 GRS 1739-278 GX 1+4 GX 9+9 H 1705-250 Hen 3-1341 Great Annihilator IRAS 16293−2422 K2-32 LS IV-1 2 2MASS J16452211-1319516 MXB 1659-29 Oph-IRS 48 PG 1627-017 PSR B1929+10 TOI-677 Van Biesbroeck 8 VVV BD001 WISE 1800+0134 WISEP J180026.60+013453.1 Wolf 635 XTE J1739-285

Exoplanets	CFHTWIR-Oph 98 b 6b 25b 26b GJ 1214 b (Enaiposha) ν Ophiuchi b c

Star
clusters

NGC	6284 6287 6293 6304 6316 6325 6342 6355 6356 6366 6401 6426 6633
Other	IC 4665 Melotte 186 Messier 9 Messier 10 Messier 12 Messier 14 Messier 19 Messier 62 Messier 107 Palomar 6

Nebulae

NGC	6309 6572
Other	Dark Horse Double Helix Nebula Ophiuchus Superbubble Pipe Nebula Rho Ophiuchi cloud complex Serpens–Aquila Rift Snake Nebula