Cha 110913-773444
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Chamaeleon |
| Right ascension | 11h 09m 13.63s |
| Declination | -77° 34' 44.6" |
| Apparent magnitude (V) | +21.59 |
| Characteristics | |
| Spectral type | L-dwarf |
| U-B color index | ? |
| B-V color index | ? |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | ? km/s |
| Proper motion (μ) | RA: ? mas/yr Dec.: ? mas/yr |
| Parallax (π) | ? ± ? mas |
| Distance | 163 ly (50 pc) |
| Absolute magnitude (MV) | +18.1 |
| Details | |
| Mass | 8 (+7 to -3) MJ, 0.008 M☉ |
| Radius | 1.8 RJ, 0.18 R☉ |
| Luminosity | 0.000096 L☉ |
| Temperature | 1,350 K |
| Metallicity | ? |
| Rotation | ? |
| Age | 0.5–10 x 106 years |
| Database references | |
| SIMBAD | data |
Cha 110913-773444 (sometimes abbreviated Cha 110913) is an astronomical object surrounded by what appears to be a protoplanetary disk. There is no consensus yet among scientists whether to classify the object as a Sub-brown dwarf (with planets) or a rogue planet (with moons). It is even smaller than OTS 44 which had been the smallest known brown dwarf prior to the discovery of Cha 110913-773444.
Cha 110913-773444 was discovered by Kevin Luhman and others at Pennsylvania State University using the Spitzer Space Telescope and the Hubble Space Telescope, as well as two earthbound telescopes in Chile.
[edit] See also
[edit] External links
- Extrasolar Planet Encyclopidea: Notes for Cha 110913
- Cha 110913-773444
- NASA: A Planet With Planets? Spitzer Finds Cosmic Oddball
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