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Exoplanet List of exoplanets
Typical hot Jupiter orbiting its host star (artist concept).
Parent star
Star NGTS-1[1]
Constellation Columba
Right ascension (α) 05h 30m 52.0s
Declination (δ) −36° 37′ 51″
Apparent magnitude (mV) 14.38[1]
Distance600[2] ly
(224.0[3] pc)
Spectral type M0.5[1]
Mass (m) 0.617[3] M
Radius (r) 0.573[3] R
Temperature (T) 3916[1] K
Metallicity [Fe/H] 0.0[3]
Physical characteristics
Mass(m)0.812[3] MJ
Radius(r)1.33[3] RJ
Temperature (T) 790.0[3]
Orbital elements
Semi-major axis(a) 0.0326[3] AU
Eccentricity (e) 0.016[3]
Orbital period(P) 2.6473 JD[3] d
Inclination (i) 82.8[3]°
Time of transit (Tt) 2457720.65939 (?)[3] JD
Discovery information
Discovery date 2017
Discoverer(s) Next-Generation Transit Survey[2]
Discovery method NGTS telescopes together with EulerCam photometric and HARPS spectroscopy followups.
Discovery status Confirmed[1]
Other designations
Database references
Extrasolar Planets
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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.[1][2][5]


The exoplanet, NGTS-1b, was discovered by the Next-Generation Transit Survey.[2] 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]


Mass, radius and temperature[edit]

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.[1][2]

Host star[edit]

The planet orbits an M0.5 dwarf star about half the mass (0.617 M) and radius (0.573 R) of the Sun.[2][3]


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

See also[edit]


  1. ^ a b c d e f g h 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. arXiv:1710.11099Freely accessible. Bibcode:2018MNRAS.475.4467B. doi:10.1093/mnras/stx2778. 
  2. ^ a b c d e f g Lewin, Sarah (31 October 2017). "Monster Planet, Tiny Star: Record-Breaking Duo Puzzles Astronomers". Retrieved 1 November 2017. 
  3. ^ a b c d e f g h i j k l m n Staff (2017). "Planet NGTS-1 b". Extrasolar Planets Encyclopaedia. Retrieved 1 November 2017. 
  4. ^ Griffini, Andrew (2 November 2017). "Huge 'monster' planet could challenge scientists' theory of how worlds form". Times of India. Retrieved 2 November 2017. 
  5. ^ a b Staff (31 October 2017). "'Monster' planet discovery challenges formation theory". 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[edit]

Coordinates: Sky map 05h 30m 52.0s, −36° 37′ 51″