NGTS-1b

NGTS-1b is a confirmed hot Jupiter-sized extrasolar planet orbiting NGTS-1, a red dwarf star about half the mass and radius of the Sun, every 2.65 days.^[4] The NGTS-1 system is about 716 light-years from Earth in the Columba constellation.^[3][1][5]

NGTS-1b

artist's concept of exoplanet NGTS-1b
Discovery
Discovered by	Next-Generation Transit Survey[1]
Discovery date	2017
Detection method	NGTS telescopes together with EulerCam photometric and HARPS spectroscopy followups.
Orbital characteristics
Semi-major axis	0.0326 AU (4,880,000 km)[2]
Eccentricity	0.016[2]
Orbital period (sidereal)	2.6473 JD[2] d
Inclination	82.8[2]
Star	NGTS-1[3]
Physical characteristics
Mean radius	1.33[2] RJ
Mass	0.812[2] MJ
Temperature	790.0[2] K

Discovery

The exoplanet, NGTS-1b, was discovered by the Next-Generation Transit Survey.^[1] Daniel Bayliss, of the University of Warwick, and lead author of the study describing the discovery of NGTS-1b, stated, "The discovery of NGTS-1b was a complete surprise to us—such massive planets were not thought to exist around such small stars—importantly, our challenge now is to find out how common these types of planets are in the Galaxy, and with the new Next-Generation Transit Survey facility we are well-placed to do just that."^[5]

Characteristics

Mass, radius and temperature

NGTS-1b is a hot Jupiter-sized gas giant exoplanet that has a mass of 0.812 M_J and a radius of 1.33 R_J, where M_J and R_J are the mass and radius of Jupiter.^[3][1]

Host star

Main article: NGTS-1

The planet orbits an M0.5 dwarf star about half the mass (0.617 M_☉) and radius (0.573 R_☉) of the Sun.^[1][2]

Orbit

NGTS-1b orbits about 4.5 million km (2.8 million mi) from the host star every 2.6473 Earth-days.^[3][1][2][6]

See also

• Kepler-45b
• List of extrasolar planets

References

1. Lewin, Sarah (31 October 2017). "Monster Planet, Tiny Star: Record-Breaking Duo Puzzles Astronomers". Space.com. Retrieved 1 November 2017.
2. Staff (2017). "Planet NGTS-1 b". Extrasolar Planets Encyclopaedia. Retrieved 1 November 2017.
3. Bayliss, Danile; et al. (31 October 2017). "NGTS-1b: A hot Jupiter transiting an M-dwarf". Monthly Notices of the Royal Astronomical Society. 475 (4): 4467–4475. arXiv:1710.11099. Bibcode:2018MNRAS.475.4467B. doi:10.1093/mnras/stx2778. S2CID 39357327.
4. Griffini, Andrew (2 November 2017). "Huge 'monster' planet could challenge scientists' theory of how worlds form". The Times of India. Retrieved 2 November 2017.
5. Staff (31 October 2017). "'Monster' planet discovery challenges formation theory". Phys.org. Retrieved 1 November 2017.
6. Dvorsky, George (31 October 2017). "This Tiny Star Hosts a Planet Nearly the Size of Jupiter". Gizmodo. Retrieved 1 November 2017.

External links

• The Next Generation Transit Survey Becomes Operational at Paranal, ESO archive, The Messenger 165 – September 2016