Star · K2
HIP 4998
HIP 4998 is a supergiant star of spectral type K2 in the constellation Cassiopeia, 647.8 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 647.8 light-years (198.6 pc) |
| Apparent magnitude | magnitude 5.99 |
| Absolute magnitude | magnitude −0.50 |
| Spectral type | K2 |
| Surface temperature | 3,880 K |
| Luminosity | 449 L☉ |
| Radius | 47 R☉ |
| Mass | 5.2 M☉ (estimated) |
| Right ascension (J2000) | 1h 04m 02.4s |
| Declination (J2000) | +52° 30′ 08″ |
| Space velocity (relative to the Sun) | 57.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.99). Visible from the whole Northern Hemisphere and south to latitude 37° S. North of latitude 37° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1378. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 11 million years.
The Sun seen from there
From a planet around HIP 4998, the Sun would look like a star of magnitude 11.32, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.