Sky position and distance
TW Hydrae is placed at J2000 RA 11 h, Dec -34.7° at 196 light-years.
SourceALMA
EpochJ2000
Space Time
Star system · evidence and sources
TW Hydrae
One of the nearest planet-forming disks, seen almost face-on so ALMA maps its nested rings and gaps with little projection distortion.
Also known as TW Hya, TWA 1.
Catalog
Position basis, the same label the app shows on the selection card.
Every aspect, with its origin
One record per aspect. The origin says what kind of thing each value is; the source says where it came from; the limit says what it cannot tell you.
ObservedCatalogComputedReconstructedIllustrativeUndocumented
Nearly face-on disk geometry
The reconstructed disk uses an inclination of about 7°.
SourceALMA Science Portal · record ADS/JAO.ALMA#2011.0.00001.SV
ALMA 870 μm observation
The ALMA image resolving rings and gaps in the nearly face-on disk is available under Evidence & sources.
SourceESO image eso1611a · record eso1611a
Disk rendering
The close-up wraps the ALMA image (870 μm) on a disk tilted to the published inclination and position angle, with 38,000 particles sampled from its ring profile.
LimitVertical structure and the far side of the disk are not resolved by the image; scale height is a display choice.
Description and facts
The short description and the fact list are written by the Space Time authors for orientation. They are not quoted from a catalog field and carry no citation of their own.
SourceSpace Time editorial text
What is not measured
- Appearance: a reconstruction from measurements, not a direct observation. Disk rendering. Vertical structure and the far side of the disk are not resolved by the image; scale height is a display choice.
Not yet documented
- Description: The short description and the fact list are written by the Space Time authors for orientation. They are not quoted from a catalog field and carry no citation of their own.
Sources cited
- ALMA
- ALMA Science Portal
- ESO image eso1611a
- S. Andrews; B. Saxton; ALMA (ESO/NAOJ/NRAO)
- Space Time editorial text