Statements (50)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:apparent_magnitude |
4.73
|
| gptkbp:average_temperature |
approximately 4,500 K
|
| gptkbp:contains_star |
Xi Hydrae B
|
| gptkbp:has_bayer_designation |
gptkb:Xi_Hydrae
|
| gptkbp:has_color |
1.45
+1.5 |
| gptkbp:has_henry_draper_designation |
HD 84737
|
| gptkbp:has_luminosity |
about 50 times that of the Sun
|
| gptkbp:has_mechanic |
-0.020 arcseconds/year
-0.045 arcseconds/year |
| gptkbp:has_radius |
about 10 solar radii
|
| gptkbp:has_spectral_type |
gptkb:K3_III
|
| gptkbp:has_title |
HIP 47980
|
| https://www.w3.org/2000/01/rdf-schema#label |
Xi Hydrae
|
| gptkbp:included |
star charts
star catalogs |
| gptkbp:is_a |
gptkb:Giant
|
| gptkbp:is_analyzed_in |
gptkb:spectroscopy
|
| gptkbp:is_associated_with |
stellar nucleosynthesis studies
|
| gptkbp:is_considered |
stellar classification systems
|
| gptkbp:is_known_for |
being a binary star system
|
| gptkbp:is_located_in |
the southern celestial hemisphere
|
| gptkbp:is_located_near |
50 light years from Earth
|
| gptkbp:is_monitored_by |
telescopes
|
| gptkbp:is_noted_for |
its historical significance in astronomy
its brightness in the night sky its relatively high luminosity |
| gptkbp:is_observed_in |
amateur astronomers
various wavelengths including infrared and optical |
| gptkbp:is_part_of |
gptkb:Hydra_constellation
gptkb:Milky_Way_galaxy the celestial sphere the study of red giants the study of stellar populations the astronomical community's interest the Milky Way's stellar population HR 3900 |
| gptkbp:is_recognized_by |
its Bayer designation
|
| gptkbp:is_referenced_in |
astronomical literature
|
| gptkbp:is_studied_in |
stellar evolution research
|
| gptkbp:is_used_in |
astrophysical models
educational purposes |
| gptkbp:is_visible_from |
gptkb:Earth
gptkb:true |
| gptkbp:mass |
about 2.5 solar masses
|
| gptkbp:measures |
astrometric techniques
|
| gptkbp:number |
Gl 2051
|
| gptkbp:orbital_period |
about 1,000 years
|
| gptkbp:scientific_classification |
a giant star in the K spectral class
|