HD 115537, an orange giant star in Coma Berenices
HD 115537 is an orange giant star in the constellation Coma Berenices. At 1,495 light years away, it shines at an apparent visual magnitude of 7.94.
HD 115537 (HIP 64849)
HD 115537 is an orange giant star in the constellation Coma Berenices. At 1,495 light years away, it shines at an apparent visual magnitude of 7.94. It is moving through the Galaxy at a speed of 60.8 km/s relative to the Sun.
Sky position: RA 13h 17.6m, Dec +19° 12.9'
Common designations: HD 115537, HIP 64849, Gaia DR3 3939700284314753792
HD 115537 has the spectral type K4III. K-type stars are orange stars with surface temperatures of about 3,900 to 5,300 K. Their spectra are rich in neutral metal lines and, in the cooler examples, molecular bands. Its luminosity class III marks it as a giant: an evolved star that has left the main sequence and swollen to many times its original size.
How to find HD 115537 in the sky
HD 115537 lies in Coma Berenices. With a declination of +19° 12.9', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 71° S. It is just beyond naked-eye visibility; binoculars will show it easily. It is highest in the sky at local midnight around May, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 115537
Astrometry and spectroscopy
| Right Ascension (J2000) | 199.39414864° (13h 17.6m) |
| Declination (J2000) | 19.21517010° (+19° 12.9') |
| Galactic Longitude | 341.47904786° |
| Galactic Latitude | 80.06963834° |
| Proper motion RA | -23.77 mas/yr |
| Proper motion Dec | -13.53 mas/yr |
| Parallax | 2.18 ± 0.02 mas |
| Spectral Type | K4III |
| Radial Velocity | 12.69 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 9.38 | 1.07 |
| V | 7.94 | -0.37 |
| J | 5.32 | -2.98 |
| H | 4.59 | -3.71 |
| K | 4.39 | -3.92 |
Colour index B-V: +1.44
Derivations
- Heliocentric distance: 458.32 pc (1,495 light years) (1.0% margin of error)
- Absolute visual magnitude: -0.37
- Transverse velocity: 59.4 km/s
- Space velocity relative to the Sun: 60.8 km/s
- Galactic position (X, Y, Z): 74.9 pc, -25.1 pc, 451.4 pc
- Galactic velocity (U, V, W): -22.8 km/s, -54.6 km/s, 13.6 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.