2020AJ....160..172N

Query : 2020AJ....160..172N

2020AJ....160..172N - Astron. J., 160, 172-172 (2020/October-0)

π Earth: a 3.14 day Earth-sized planet from K2's kitchen served warm by the SPECULOOS team.

NIRAULA P., DE WIT J., RACKHAM B.V., DUCROT E., BURDANOV A., CROSSFIELD I.J.M., VAN GROOTEL V., MURRAY C., GARCIA L.J., ALONSO R., BEARD C., GOMEZ MAQUEO CHEW Y., DELREZ L., DEMORY B.-O., FULTON B.J., GILLON M., GUNTHER M.N., HOWARD A.W., ISSACSON H., JEHIN E., PEDERSEN P.P., POZUELOS F.J., QUELOZ D., REBOLO-LOPEZ R., LALITHA S., SEBASTIAN D., THOMPSON S. and TRIAUD A.H.M.J.

Abstract (from CDS):

We report on the discovery of a transiting Earth-sized (0.95R⊕) planet around an M3.5 dwarf star at 57 pc, EPIC 249631677. The planet has a period of ∼3.14 days, i.e., ∼π, with an installation of 7.45 S⊕. The detection was made using publicly available data from K2's Campaign 15. We observed three additional transits with SPECULOOS Southern and Northern Observatories, and a stellar spectrum from Keck/HIRES, which allowed us to validate the planetary nature of the signal. The confirmed planet is well suited for comparative terrestrial exoplanetology. While exoplanets transiting ultracool dwarfs present the best opportunity for atmospheric studies of terrestrial exoplanets with the James Webb Space Telescope, those orbiting mid-M dwarfs within 100 pc such as EPIC 249631677b will become increasingly accessible with the next generation of observatories.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet detection methods - Transit photometry

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 1326B Er* 00 18 25.8251408611 +44 01 38.092431857   12.84 11.04 10.3   M3.5V 286 0
2 NAME G 268-38c Pl 00 44 59.3309137511 -15 16 17.542839990           ~ 63 0
3 NAME BD-17 588BC ** 03 01 51.076872 -16 35 31.06608   12.30 10.59 11.06   M2.5V 56 0
4 NAME L 98-59 b Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 39 0
5 NAME L 98-59 c Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 49 0
6 NAME L 98-59 d Pl 08 18 07.6214406393 -68 18 46.805365587           ~ 50 0
7 NAME L 678-39b Pl 09 36 01.6372169407 -21 39 38.877606712           ~ 60 0
8 NAME L 320-124b Pl 10 14 51.7786855411 -47 09 24.192778106           ~ 169 0
9 NAME LP 791-18b Pl 11 02 45.9546199392 -16 24 22.288196376           ~ 16 0
10 Ross 128 Er* 11 47 44.3972681420 +00 48 16.400337591 14.223 12.905 11.153 9.859 8.184 dM4 420 0
11 K2-257b Pl 12 33 06.8370164304 -01 57 11.391970752           ~ 6 0
12 K2-315b Pl 15 12 05.1944248848 -20 06 30.542814144           ~ 2 0
13 K2-315 PM* 15 12 05.1944248848 -20 06 30.542814144           M3.5V 3 0
14 HD 173740 PM* 18 42 46.8946714770 +59 37 36.721161413   11.32 9.78     M3.5V 338 1
15 Kepler-446b Pl 18 49 00.0433305672 +44 55 15.977921880           ~ 23 0
16 Kepler-446d Pl 18 49 00.0433305672 +44 55 15.977921880           ~ 21 0
17 Kepler-446c Pl 18 49 00.0433305672 +44 55 15.977921880           ~ 17 0
18 Kepler-445d Pl 19 54 56.6592332856 +46 29 54.793640508           ~ 20 0
19 Kepler-445b Pl 19 54 56.6592332856 +46 29 54.793640508           ~ 21 0
20 NAME LP 759-72d Pl 22 18 29.2548547872 -09 36 44.381088036           ~ 10 0
21 NAME L 119-213b Pl 22 41 58.1171811377 -69 10 08.320741850           ~ 103 0
22 TRAPPIST-1h Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 127 0
23 TRAPPIST-1d Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 214 0
24 TRAPPIST-1e Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 287 0
25 TRAPPIST-1f Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 232 0
26 TRAPPIST-1b Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 256 0
27 TRAPPIST-1c Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 193 0
28 TRAPPIST-1g Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 195 0
29 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 995 0
30 K2-138 * 23 15 47.7686067840 -10 50 58.895461284   13.01 12.21 12.12 11.40 ~ 54 0
31 BD-02 5958c Pl 23 27 04.8376907739 -01 17 10.582653030           ~ 26 0
32 BD-02 5958 PM* 23 27 04.8376907739 -01 17 10.582653030   11.57 10.10 10.09 8.89 K6V 80 0

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