BD+48 740

BD+48 740
Observation data Epoch J2000 Equinox J2000
Constellation	Perseus
Right ascension	02^h 42^m 58.21780^s^[1]
Declination	+48° 55′ 48.2155″
Characteristics
Spectral type	K2
B−V color index	+1.35
Variable type	constant
Astrometry

Radial velocity (R_v)	-5.60 km/s
Proper motion (μ)	RA: -5.94 mas/yr Dec.: -2.02 mas/yr
Parallax (π)	1.36^[1] mas

Other designations
BD+48 740, AG+48 308, GSC 03304-00090, HIC 12684, HIP 12684, 2MASS J02425822+4855483, PPM 45405, SAO 38272, TYC 3304-90-1
Database references
SIMBAD	data

BD+48 740 is a giant star suspected of having recently engulfed one of its planets. The star has an overabundance of lithium in its atmosphere, a metal that is destroyed by nuclear reactions in stars. Detection of radial velocity variations indicate a companion planet of 1.6 jupiter masses in a highly eccentric orbit, making orbits of other planets unstable. These indications make the discoverers conclude that another planet has recently plunged into the star, been destroyed, and contributed its lithium content to the star.^[2]

References

1 2 "BD+48 740". SIMBAD Astronomical Database. Retrieved 2012-08-22.
↑ BD+48 740 - Li overabundant giant star with a planet. A case of recent engulfment? Bibcode: 2012ApJ...754L..15A

External links

BD+48 740 – Li overabundant giant star with a planet. A case of recent engulfment? M. Adamów, A. Niedzielski, E. Villaver, G. Nowak, A. Wolszczan, 21 June 2012

Stars of Perseus

Bayer	α (Mirfak / Algenib) β (Algol, Gorgonea Prima) γ δ ε ζ η (Miram) θ ι κ (Misam) λ μ ν ξ (Menkib) ο (Atik) π (Gorgonea Secunda) ρ (Gorgonea Tertia) σ τ φ ψ ω (Gorgonea Quarta) b

Flamsteed	1 2 3 4 5 7 (χ) 8 9 10 11 12 14 16 17 20 21 24 29 30 31 32 34 36 40 42 43 48 49 50 52 53 54 55 56 57 58 59 1 Aur

Variable	S T U V X Z RS RT RV RW RY ST SU SV TZ UV UX UY VX XY XZ YZ AB AG AR AS AW AX BM DM DY FO GK IK IP IQ IU IW IX IZ KP KS KT KW LX V351 V356 V357 V361 V376 V380 V386 V396 V400 V423 V432 V440 V459 V461 V471 V472 V473 V480 V490 V492 V493 V505 V509 V520 (61 And) V521 V545 V551 V572 V573 V575 V576 V621 V718

HR	470 526 529 538 540 621 641 787 792 810 820 831 842 846 849 864 865 876 885 886 890 894 918 920 923 930 949 950 956 964 966 969 973 975 979 986 991 1001 1019 1034 1037 1041 1047 1051 1056 1059 1074 1097 1113 1127 1130 1133 1141 1160 1164 1176 1191 1197 1198 1207 1215 1226 1234 1286 1301 1330 1333 1337 1344 1371 1390 1419 1424 1482 1489 1493 1500 1514

HD	13519 14433 14434 16691 16760 17092 17245 17605 21684 22781 23301 23596 25329 26702 29587

Gliese	GJ 1068

Other	BD+31 643 BD+48 740 G 38-29 G 95-57 GD 61 GRO J0422+32 HAT-P-15 HAT-P-29 IRAS 04296+3429 L1448-IRS2E LkHα 101 LRLL 54361 NGC 1333 13 NGC 1333 IRAS 2A NGC 1333 IRAS 4A NGC 1333 IRAS 4B NSV 1436 PSR B0355+54 PSR J0357+3205

List

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