Sky position and distance
HH 30 is placed at J2000 RA 4.5 h, Dec 18.2° at 450 light-years.
SourceHubble WFPC2
EpochJ2000
Space Time
Star system · evidence and sources
HH 30
An almost edge-on young stellar disk firing a narrow, episodic bipolar jet whose knots measurably cross the sky.
Also known as HH30, Herbig-Haro 30.
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
Measured jet proper motions
Published measurements find roughly 100–300 km/s knot motions and a wiggling, nearly sky-plane jet.
SourceAnglada et al. 2007 · record astro-ph/0703155
UncertaintyReported inclination spans 0–40°; this reconstruction uses a near-sky-plane 4° presentation consistent with the edge-on disk.
LimitIndividual authored knots use representative speeds inside the observed range, not a forecast ephemeris.
Hubble disk and jet monitoring
Hubble resolved the edge-on disk and followed changing knots in the bipolar jet from 1995 through 2000.
SourceNASA Hubble HH 30
Epoch1995–2000
Disk rendering
The close-up wraps the Hubble WFPC2 image (visible scattered light and optical jet emission) on a disk tilted to the published inclination and position angle, with 15,000 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
- Physical data: no record. Space Time does not claim a source for this aspect.
- 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.