Harman Patil (Editor)

WISE 1828 2650

Updated on
Edit
Like
Comment
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Apparent magnitude (J (MKO filter system))
  
23.57 ± 0.35

Temperature
  
250–400 K

Constellation
  
Lyra

WISE 1828+2650 Astronomy Cmarchesin February 2012

Distance
  
approx. 47 ly; (approx. 14 pc)

People also search for
  
Kappa Lyrae, Delta1 Lyrae, Lambda Lyrae

WISE 1828+2650 (full designation WISEPA J182831.08+265037.8) is a brown dwarf or rogue planet of spectral class >Y2, located in constellation Lyra at approximately 47 light-years from Earth. It is the "archetypal member" of the Y spectral class.

Contents

WISE 1828+2650 httpsiytimgcomviUpirXFIZXUhqdefaultjpg

Discovery

WISE 1828+2650 Stars are hot right Not this star Space EarthSky

WISE 1828+2650 was discovered in 2011 from data collected by NASA's 40 cm (16 in) Wide-field Infrared Survey Explorer (WISE) space telescope at infrared wavelength. WISE 1828+2650 has two discovery papers: Kirkpatrick et al. (2011) and Cushing et al. (2011), however, basically with the same authors and published nearly simultaneously.

WISE 1828+2650 WISE 18282650 Wikipedia

  • 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 1828+2650 — coolest of them.
  • Cushing et al. presented discovery of seven brown dwarfs — one of T9.5 type, and six of Y-type — first members of the Y spectral class, ever discovered and spectroscopically confirmed, including "archetypal member" of the Y spectral class — WISE 1828+2650. These seven objects are also the faintest seven of 98 brown dwarfs, presented in Kirkpatrick et al. (2011).

    • Distance

    WISE 1828+2650 Wise 1828 2650 YouTube

    Currently the most accurate distance estimate of WISE 1828+2650 is a trigonometric parallax, measured using Spitzer Space Telescope and published in 2013 by Trent Dupuy and Adam Kraus: 0.070 ± 0.014 arcsec, corresponding to a distance 14.3+3.6
    −2.4     pc, or 46.6+11.6
    −7.8     ly.

    Proper motion

    WISE 1828+2650 has proper motion of about 966 milliarcseconds per year.

    Physical properties

    WISE 1828+2650 Stars are hot right Not this star Space EarthSky

    Until the discovery of WISE 0855−0714 in 2014 WISE 1828+2650 was considered as the coldest currently known brown dwarf or the first example of free-floating planet (it is not currently known if it is a brown dwarf or a free-floating planet). It has a temperature in the range 250–400 K (−23–127 °C; −10–260 °F) and was initially estimated below 300 K, or about 27 °C (81 °F). It has been assigned the latest known spectral class (>Y2, initially estimated as >Y0).

    The mass of WISE 1828+2650 is in the range 0.5–20 MJup for ages of 0.1–10 Gyr.

    WISE 1828+2650 little journey

    High tangential velocity of WISE 1828+2650, characteristic of an old disk population, indicates possible age of WISE 1828+2650 in the range 2–4 Gyr, leading to mass estimate of about 3–6 MJup.

    WISE 1828+2650 is similar in appearance to the other Y-type object WD 0806-661 B. WD 0806-661 B could have formed as a planet close to its primary, WD 0806-661 A, and later, when the primary became a white dwarf and lost most of its mass, have migrated into a larger orbit of 2500 AU, and similarity between WD 0806-661 B and WISE 1828+2650 may indicate that WISE 1828+2650 had formed in the same way.

    Possible binarity

    Comparison between WISE 1828+2650 and WD 0806-661 B may suggest that WISE 1828+2650 is a system of two equal-mass objects. Observations with Hubble Space Telescope (HST) and Keck-II LGS-AO system had not revealed binarity, suggesting that if any such companion exists, it would have an orbit less than 0.5 AU, and no evidence for binarity yet exists.

    References

    WISE 1828+2650 Wikipedia
    (Text) CC BY-SA