Sky position and distance
DG Tauri is placed at J2000 RA 4.5 h, Dec 26.1° at 394 light-years.
EpochJ2000
Space Time
Star system · evidence and sources
DG Tauri
A T Tauri star with a collimated jet detected at radio, optical, and X-ray wavelengths.
Also known as DG Tau, HH 158.
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
Multi-epoch jet-knot motion
A roughly 20-year optical, radio, and X-ray baseline gives 159 ± 7 km/s for the south-west knot at the adopted 120.8 pc distance.
SourceAinsworth et al. 2018 · record arXiv:1809.10065
UncertaintyRepresentative sky-plane motion ±7 km/s; individual inner working surfaces differ.
LimitAuthored knots share this representative flow scale; they are not individual fitted ephemerides.
Measured disk and jet geometry
The disk is inclined about 41° at position angle 128°; the jet is approximately perpendicular at position angle 226°.
SourcePodio et al. 2019 · record A&A 623 L6
UncertaintyDisk inclination ±2°; disk position angle ±16°; jet position angle ±10°.
Multi-wavelength jet detections
The jet has been resolved in radio, optical, and X-ray observations; the card keeps the NASA Chandra visualization as evidence rather than placing it in space.
SourceNASA DG Tau 3D resource
LimitThe evidence image is a NASA visualization based on Chandra data, not a direct optical photograph.
Resolved inner radio jet
VLA observations resolve a 42 AU inner thermal jet aligned with the outer optical and X-ray flow.
SourceAinsworth et al. 2013 · record arXiv:1302.0751
Disk rendering
The close-up wraps the Chandra X-ray Observatory image (X-ray jet reconstruction asset) on a disk tilted to the published inclination and position angle, with 13,000 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.