Statements (50)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:bfsLayer |
5
|
| gptkbp:bfsParent |
gptkb:Lyra_constellation
|
| gptkbp:age |
approximately 2.5 billion years
various estimates suggest similar ages |
| gptkbp:apparent_magnitude |
8.0
approximately 8.0 used for analyzing stellar populations |
| gptkbp:associated_with |
open cluster family
|
| gptkbp:contains |
more than 100
more than 100 stars |
| gptkbp:coordinates |
RA 19h 40m 36s, Dec +40° 11′ 00″
l = 75.5°, b = +2.5° |
| gptkbp:declination |
+40° 11′ 00″
|
| gptkbp:depicted_in |
best viewed in summer months
|
| gptkbp:diameter |
approximately 10 light years
|
| gptkbp:discovered_by |
gptkb:William_Herschel
|
| gptkbp:distance |
approximately 3,600 light years
approximately 3,700 light years various methods used for distance estimation |
| gptkbp:exhibition |
gptkb:New_General_Catalogue
|
| gptkbp:formation_date |
has a complex star formation history
|
| gptkbp:future_plans |
ongoing studies on stellar dynamics and evolution
|
| gptkbp:has_color |
B-V = 0.65
|
| gptkbp:has_spectral_type |
various types
|
| gptkbp:historical_significance |
one of the well-studied open clusters
|
| https://www.w3.org/2000/01/rdf-schema#label |
NGC 6819
|
| gptkbp:is_observed_in |
gptkb:Hubble_Space_Telescope
|
| gptkbp:lighting |
some stars exhibit variability
|
| gptkbp:located_in |
constellation Cygnus
|
| gptkbp:mass |
approximately 1,000 solar masses
contains both main sequence and evolved stars studied for mass distribution |
| gptkbp:mechanics |
dynamically relaxed cluster
|
| gptkbp:membership |
includes both binary and single stars
|
| gptkbp:metallicity |
solar metallicity
|
| gptkbp:notable_person |
K giants
|
| gptkbp:population |
moderate density cluster
|
| gptkbp:previous_name |
C 1940+401
|
| gptkbp:publishes |
numerous publications in astrophysics journals
|
| gptkbp:research |
requires telescope for observation
available in astronomical databases light pollution affects visibility |
| gptkbp:research_focus |
studied for stellar evolution
|
| gptkbp:right_ascension |
19h 40m 36s
|
| gptkbp:size |
approximately 10 arcminutes across
|
| gptkbp:storage |
conducted in various wavelengths
|
| gptkbp:track |
used for understanding stellar evolution
|
| gptkbp:type |
Galactic open cluster
|
| gptkbp:year_created |
1784
|