HD 161988
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 6.07±0.01[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[3] |
| Spectral type | K2 III[4] |
| U−B Template:Engvar | +1.28[5] |
| B−V Template:Engvar | +1.20[5] |
| Astrometry | |
| Radial velocity (Rv) | +36.8±0.4[6] km/s |
| Proper motion (μ) | RA: +2.464 mas/yr[1] Dec.: −1.867 mas/yr[1] |
| Parallax (π) | 5.2546±0.022 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.26[7] |
| Details | |
| Mass | 3.05[8] Template:Solar mass |
| Radius | 20.8[9] Template:Solar radius |
| Luminosity | 185[10] Template:Solar luminosity |
| Surface gravity (log g) | 2.04±0.02[3] cgs |
| Temperature | 4,498[10] K |
| Metallicity [Fe/H] | −0.13[11] dex |
| Rotational velocity (v sin i) | 2.1±1.3[12] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[13] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
HD 161988, also known as HR 6635, is a solitary, orange hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.07,[2] allowing it to be faintly visible to the naked eye. Parallax measurements place it at a distance of 621 light years,[1] and it is currently receding with a heliocentric radial velocity of Script error: No such module "val"..[6]
The object has a stellar classification of K2 III,[4] indicating that it is a red giant. Gaia Data Release 3 models place it on the red giant branch. At present it has 3.05 times the mass of the Sun[8] and an enlarged radius of Script error: No such module "val"..[9] It shines at 185 times the luminosity of the Sun from its photosphere at an effective temperature of Script error: No such module "val"..[10] HD 161988 has an iron abundance 74% that of the Sun,[11] making it slightly metal deficient. Like most giants, it spins modestly with a projected rotational velocity of Script error: No such module "val"..[12]
HD 161988 has a 14th magnitude optical companion located Script error: No such module "val". away along a position angle of 122°.[14]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e Template:Cite Gaia EDR3
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Template:Cite Gaia DR3
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "Citation/CS1".
<ref> tag with name "Gould1879" defined in <references> is not used in prior text.Script error: No such module "Check for unknown parameters".