Gaia20ehk
Optical image of Gaia-GIC-1/Gaia20ehk taken by the Dark Energy Camera (DECam) on the 4.0m Blanco telescope at the Cerro Tololo Inter-American Observatory in Chile. | |
| Observation data Epoch J2015 Equinox J2015 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 47m 25.14s |
| Declination | −34° 09′ 32.4″ |
| Characteristics | |
| Spectral type | F5 |
| J−K color index | 0.78 |
| Astrometry | |
| Proper motion (μ) | RA: −2.446 mas/yr Dec.: +2.946 mas/yr |
| Parallax (π) | 0.3008±0.1550 mas |
| Distance | approx. 11,000 ly (approx. 3,000 pc) |
| Details | |
| Mass | 1.3 M☉ |
| Radius | 1.7 R☉ |
| Surface gravity (log g) | 4.1 cgs |
| Temperature | 6,479 K |
| Metallicity [Fe/H] | −0.2 dex |
| Other designations | |
| AT 2020tdg, 2MASS 07472514-3409324, Gaia DR3 5593847908340254848 | |
Gaia20ehk, also known as Gaia-GIC-1 (Giant Impact Candidate), is likely a young F-type variable star which is believed to have recently undergone an giant impact planetary collision that exhibits recently generated hot circumstellar dust. The star is located 11,000 light-years (3,400 pc) from Earth in the constellation of Puppis. Gaia-GIC-1 marks the first discovered planetary collision event found by the ESA's Gaia spacecraft and joins among a handful of other suspected planetary collision systems such as ASASSN-21qj, NGC 2547–ID8, HD 166191 and V488 Persei.