Contents

WISEPA J174124.26+255319.5

Star in the constellation Hercules

WISEPA J174124.26+255319.5

WISE 1741+2553 Credit: legacy surveys
Observation data Epoch MJD 55451.80[1]      Equinox J2000[1]
Constellation	Hercules
Right ascension	17h41m 24.22s[1]
Declination	25° 53′ 18.96″[1]
Characteristics
Spectral type	T9[1]
Apparent magnitude (J (2MASS filter system))	16.53±0.02[1]
Apparent magnitude (H(2MASS filter system))	16.63±0.03[1]
Apparent magnitude (KS (2MASS filter system))	16.89±0.20[1]
Astrometry
Proper motion (μ)	RA: −495±11[2] mas/yr Dec.: −1472±13[2] mas/yr
Parallax (π)	214.3 ± 2.8 mas[3]
Distance	15.2 ± 0.2 ly (4.67 ± 0.06 pc)
Details
Surface gravity (log g)	4.00[4] cgs
Temperature	748±1[4] K
Metallicity	0 dex[4]
Rotational velocity (v sin i)	21+16 −14[4] km/s
Other designations
GJ 12549[5],WISEPC J174124.25+255319.5[6] WISEPA J174124.26+255319.5[1] WISE J1741+2553[1]
Database references
SIMBAD	data
WISE 1741+2553 Location of WISE 1741+2553 in the constellation Hercules

WISEPA J174124.26+255319.5 (designation is abbreviated to WISE 1741+2553) is a brown dwarfofspectral class T9,^[1][7] located in constellation Hercules at approximately 15.2 light-years from Earth.^[3]

WISE 1741+2553 was discovered in 2011 from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. WISE 1741+2553 has three discovery papers: Scholz et al. (2011), Gelino et al. (2011) and Kirkpatrick et al. (2011).^[6][8][1]

• Scholz et al. discovered two late T-type brown dwarfs, including WISE 1741+2553, using preliminary data release from WISE and follow-up near-infrared spectroscopy with LUCIFER1 near-infrared camera/spectrograph at the Large Binocular Telescope (LBT).
• Gelino et al. examined for binarity nine brown dwarfs using Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II telescopeonMauna Kea; seven of these nine brown dwarfs were also newfound, including WISE 1741+2553. These observations had indicated that two of these nine brown dwarfs are binary, but the other seven, including WISE 1741+2553, are single brown dwarfs.
• Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 1741+2553.^{[1][~ 1]}

Currently the most accurate distance estimate of WISE 1741+2553 is a trigonometric parallax, measured using Spitzer Space Telescope and published in 2013 by Trent Dupuy and Adam Kraus: 0.180±0.015 arcsec, corresponding to a distance 5.6+0.5
−0.4 pc, or 18.1+1.6
−1.4 ly.^[9]

WISE 1741+2553 has proper motion of about 1553 milliarcseconds per year.^[2]

Another object, discovered by Scholz et al. (2011):^[6]

• WISE 0254+0223 (T8)

The other eight objects, checked for binarity by Gelino et al. (2011) on Keck II:^[8]

• binarity found:
  • WISE 0458+6434 (T8.5 + T9.5, component A discovered before by Mainzer et al. (2011)^[10])
  • WISE 1841+7000 (T5 + T5, newfound)
• binarity not found:
  • WISE 0750+2725 (T8.5, newfound^{[~ 2]})
  • WISE 1322-2340 (T8, newfound)
  • WISE 1614+1739 (T9, newfound)
  • WISE 1617+1807 (T8, discovered before by Burgasser et al. (2011)^[11])
  • WISE 1627+3255 (T6, newfound)
  • WISE 1653+4444 (T8, newfound)
• List of nearest stars
• WISE 1541-2250 — Y0.5 object (44 light-years)
• UGPS 0722−05 — similar T9 object (13 light-years)

• Smart, R. L.; Tinney, C. G.; Bucciarelli, B.; Marocco, F.; Abbas, U.; Andrei, A.; Bernardi, G.; Burningham, B.; Cardoso, C.; Costa, E.; Crosta, M. T.; Daprá, M.; Day-Jones, A.; Goldman, B.; Jones, H. R. A.; Lattanzi, M. G.; Leggett, S. K.; Lucas, P.; Mendez, R.; Penna, J. L.; Pinfield, D.; Smith, L.; Sozzetti, A.; Vecchiato, A. (2013). "NPARSEC: NTT Parallaxes of Southern Extremely Cool objects. Goals, targets, procedures and first results". Monthly Notices of the Royal Astronomical Society. 433 (3): 2054–2063. arXiv:1306.4527. Bibcode:2013MNRAS.433.2054S. doi:10.1093/mnras/stt876.

• Two new nearby brown dwarfs found Archived 2011-10-30 at the Wayback Machine (Phil Plait August 9, 2011)
• Solstation.com (New Objects within 20 light-years)