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 600 light-years from Earth in the Columba constellation.[3][1][5]

NGTS-1b
artist's concept of exoplanet NGTS-1b
Discovery
Discovered byNext-Generation Transit Survey[1]
Discovery date2017
NGTS telescopes together with EulerCam photometric and HARPS spectroscopy followups.
Orbital characteristics
0.0326 AU (4,880,000 km)[2]
Eccentricity0.016[2]
2.6473 JD[2] d
Inclination82.8[2]
StarNGTS-1[3]
Physical characteristics
Mean radius
1.33[2] RJ
Mass0.812[2] MJ
Temperature790.0[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 MJ and a radius of 1.33 RJ, where MJ and RJ are the mass and radius of Jupiter.[3][1]

    Host star

    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

    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.

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