KELT-9

White-Blue star

Spectral class: A0

Location

Right ascension: 20h 31m 26.381s

Declination: 39° 56' 20.108'' (northern hemisphere)

Parallax: 4.826

Sun distance: 675.854 ly | 207.2 pc

Basic characteristic

Mass: 240 % M Sun (estimate)

Size: 229 % R Sun

Temperature: 10170 K | 1.76 T Sun

Photometry

Apparent magnitude (V): 7.6

Absolute magnitude (V): 1

K
2.1

H
1.6

J
1.2

Grp
0.8

I
0.8

G
0.6

V
0.5

Gbp
0.5

B
0.4

U
0.3

Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).

KELT-9 system structure

	KELT-9
		KELT-9 b	0.03 AU	915.6 M⊕	20.6 R⊕	1.5 days

More about KELT-9

Star KELT-9 is a main sequence star that fuses hydrogen atoms into helium. It is is approximately 2 times bigger than the Sun and temperature on its surface is around 10170 K (9897 °C), which is about 176 % of Sun's temperature.

       KELT-9 can be found in northern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is easily observable from Northern America, Europe and Asia.

Other designations of this star
HD 195689, Gaia DR3 2064327278651198336

External sources

The GAPS programme at TNG LX Atmospheric characterisation of KELT-9 b via single-line analysis: Detection of six H I Balmer lines, Na I, Ca I, Ca II, Fe I, Fe II, Mg I, Ti II, Sc II, and Cr II

Scientific study, Accepted: 03. 09. 2024

Low abundances of TiO and VO on the Dayside of KELT-9 b: Insights from Ground-Based Photometric Observations

Scientific study, Accepted: 28. 08. 2024

Multiepoch Detections of the Extended Atmosphere and Transmission Spectra of KELT-9b with a 1.5 m Telescope

Scientific study, 13. 02. 2023

Gaia database (Gaia DR3 2064327278651198336)

Archive from the Gaia mission

TESS database (TOI 1150.01)

Archive from the TESS mission