| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 35m 53.45s[1] |
| Declination | +11° 30′ 05.2″[1] |
| Characteristics | |
| Spectral type | T9[1] |
| Astrometry | |
| Distance | 26–40[2] ly (8–12[2] pc) |
| Details | |
| Mass | 0.014–0.030[2] M☉ |
| Temperature | 500–550[3] K |
| Age | 0.6–5.3[2] Gyr |
| Database references | |
| SIMBAD | data |
ULAS J133553.45+113005.2 (also calledULAS1335) is aT-typebrown dwarf in theconstellation ofVirgo.[1] It was discovered in data from the UK Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS). Its discovery was reported June 2008.[2]
After identification, ULAS1335 was imaged using the UFTI camera on the UKIRT, onMauna Kea,Hawaii, to confirm itsphotometric properties and location. It wasspectroscopically confirmed as a T9 dwarf using theGemini North telescope, also at Mauna Kea, and was imaged using IRAC on theSpitzer Space Telescope. The IRAC imaging confirmed it as the reddest (in near-to-mid-infrared colors) T dwarf yet discovered, and by inference the coolest.[2]
ULAS1334 was initially estimated to have a temperature around 550–600K, a distance of 8–12parsecs (26–39light-years), and a mass of 15–31Jupiter masses.[2] More recent spectroscopic observations, using IRS on the Spitzer Space Telescope, give an effective temperature of 500–550 K.[3] Since these temperature estimates are based on model comparisons, they should be treated with caution until theparallax of this object has been measured.[2]
