Star · ?
GJ 3729
GJ 3729 is a main-sequence star of spectral type ? in the constellation Canes Venatici, 76.7 light-years from the Sun.
| Constellation | Canes Venatici |
|---|---|
| Distance | 76.7 light-years (23.5 pc) |
| Apparent magnitude | magnitude 12.90 |
| Absolute magnitude | magnitude 11.04 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0148 L☉ |
| Radius | 0.304 R☉ |
| Mass | 0.303 M☉ (estimated) |
| Right ascension (J2000) | 12h 29m 03.1s |
| Declination (J2000) | +41° 43′ 50″ |
| Space velocity (relative to the Sun) | 32.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.90. Visible from the whole Northern Hemisphere and south to latitude 48° S. North of latitude 48° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1949. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 3729, the Sun would look like a star of magnitude 6.69, in the direction where our sky has the constellation Phoenix. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASSW J1246467+402715 5.88 light-years
- SDSS J125011.65+392553.9 6.20 light-years
- GJ 9393 6.46 light-years
- GJ 3706 7.41 light-years
- HIP 63406 7.61 light-years
- GJ 3738 7.61 light-years
- GJ 3697 7.66 light-years
- GJ 3741A 9.24 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.