38 Lyncis

Star in the constellation Lynx

38 Lyncis
Observation data Epoch J2000 Equinox J2000
Location of 38 Lyncis (circled in red)
Constellation	Lynx
Right ascension	09^h 18^m 50.64384^s^[1]
Declination	+36° 48′ 09.3331″^[1]
Apparent magnitude (V)	3.82^[2] (3.95 + ? + 6.30)^[3]
Characteristics
Spectral type	A3V^[4] (A1V + A4V)^[5]
B−V color index	0.066±0.010^[2]
Astrometry

Radial velocity (R_v)	4.0±2.7^[2] km/s
Absolute magnitude (M_V)	+0.98^[6]


A
Proper motion (μ)	RA: –36.288^[7] mas/yr Dec.: −121.767^[7] mas/yr
Parallax (π)	27.8044 ± 0.7879 mas^[7]
Distance	117 ± 3 ly (36 ± 1 pc)
B
Proper motion (μ)	RA: –26.513^[8] mas/yr Dec.: −127.261^[8] mas/yr
Parallax (π)	24.4730 ± 0.1240 mas^[8]
Distance	133.3 ± 0.7 ly (40.9 ± 0.2 pc)
Details
38 Lyn A
Mass	1.90^[9] `M`_☉
Radius	3.07^[10] `R`_☉
Luminosity	32^[6] `L`_☉
Surface gravity (log g)	3.86^[9] cgs
Temperature	8,862±301^[9] K
Metallicity [Fe/H]	−0.36^[11] dex
Rotational velocity (v sin i)	163^[11] km/s
Age	213^[9] Myr
38 Lyn B
Mass	1.30/0.90^[12] `M`_☉
Radius	2.55^[8] `R`_☉
Luminosity	5^[8] `L`_☉
Temperature	5,409^[8] K
Other designations
38 Lyn, BD+37°1965, FK5 346, HD 80081, HIP 45688, HR 3690, SAO 61391, WDS J09188+3648^[13]
Database references
SIMBAD	data
	A
	B

38 Lyncis is a multiple star system in the northern constellation of Lynx. It located about 125 light-years from the Sun, based on parallax.

When viewed through a moderate telescope, two components—a brighter blue-white star of magnitude 3.9 and a fainter star of magnitude 6.1 that has been described as lilac as well as blue-white—can be seen.^[14] The pair have an angular separation of 2.6″ and an estimated period of 429 years.^[12] The fainter component is itself a close binary which can only be resolved using speckle interferometry. The two were separated by 0.06″ in 1993^[15] and 0.237″ in 2008,^[16] and have an estimated orbital period of 2.1 years.^[12] A further faint star, component E 100″ away, is a proper-motion companion.^[17]^[18] Two other faint companions listed in multiple star catalogues as components C and D are unrelated background objects.^[19]^[20]

38 Lyncis was given as a standard star for the spectral class of A3 V when the Morgan-Keenan classification system was first defined in 1943, apparently for the two components combined.^[21]

The primary star, component A, is a class A main sequence star around twice the mass of the sun. An effective temperature of 8,862 K and a radius of 3.09 R_☉ mean that it is over thirty times more luminous than the sun. It has been listed as a λ Boötis star, although it is no longer considered to be a member.^[6] The fainter of the pair, component B, has been given a spectral class of A4V, although it consists of two very close stars. Their properties are poorly-known, even the difference in their apparent magnitudes can only be estimated to be approximately 2. Based on this, their masses are estimated to be 1.3 M_☉ and 0.9 M_☉ respectively.^[12] Component E is a 15th magnitude star with an approximate spectral type of M2, a red dwarf, and an estimated mass of 0.31 M_☉,^[12] and a temperature of 3,816 K.^[18]

From the Star-Registration registry, this star was named: Isabelle Deslaurier.

References

^ ^a ^b van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ ^a ^b ^c Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
^ Cowley, A.; et al. (April 1969). "A study of the bright A stars. I. A catalogue of spectral classifications". Astronomical Journal. 74: 375–406. Bibcode:1969AJ.....74..375C. doi:10.1086/110819.
^ Palmer, D. R.; et al. (1968). "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars". Royal Observatory Bulletin. 135: 385. Bibcode:1968RGOB..135..385P.
^ ^a ^b ^c Murphy, Simon J.; Paunzen, Ernst (2017). "Gaia's view of the λ Boo star puzzle". Monthly Notices of the Royal Astronomical Society. 466 (1): 546–555. arXiv:1612.01528. Bibcode:2017MNRAS.466..546M. doi:10.1093/mnras/stw3141. S2CID 119328659.
^ ^a ^b ^c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607.
^ Gáspár, András; Rieke, George H.; Ballering, Nicholas (2016). "The Correlation Between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. S2CID 119241004.
^ ^a ^b Takeda, Yoichi; Kang, Dong-Il; Han, Inwoo; Lee, Byeong-Cheol; Kim, Kang-Min (2009). "Can Sodium Abundances of A-Type Stars be Reliably Determined from Na I 5890/5896 Lines?". Publications of the Astronomical Society of Japan. 61 (5): 1165–1178. arXiv:0907.1329. Bibcode:2009PASJ...61.1165T. doi:10.1093/pasj/61.5.1165. S2CID 15454888.
^ ^a ^b ^c ^d ^e "Multiple Star Catalog". Archived from the original on 2020-09-14. Retrieved 2019-06-08.
^ "38 Lyncis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-06.
^ Monks, Neale (2010). Go-To Telescopes Under Suburban Skies. New York, New York: Springer Science & Business Media. p. 58. ISBN 9781441968517.
^ McAlister, Harold A.; Mason, Brian D.; Hartkopf, William I.; Shara, Michael M. (1993). "ICCD speckle observations of binary stars. X - A further survey for duplicity among the bright stars". The Astronomical Journal. 106: 1639. Bibcode:1993AJ....106.1639M. doi:10.1086/116753.
^ Hartkopf, William I.; Mason, Brian D.; Rafferty, Theodore J. (2008). "Speckle Interferometry at the Usno Flagstaff Station: Observations Obtained in 2003-2004 and 17 New Orbits". The Astronomical Journal. 135 (4): 1334–1342. Bibcode:2008AJ....135.1334H. doi:10.1088/0004-6256/135/4/1334.
^ De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I.; MacIntosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Thomas, S.; Lai, O. (2014). "The VAST Survey – III. The multiplicity of A-type stars within 75 pc". Monthly Notices of the Royal Astronomical Society. 437 (2): 1216–1240. arXiv:1311.7141. Bibcode:2014MNRAS.437.1216D. doi:10.1093/mnras/stt1932. S2CID 88503488.
^ ^a ^b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Retrieved 2015-07-22.
^ Dommanget, J.; Nys, O. (1995). "Catalogue of the components of double and multiple stars (CCDM)- First edition, June 1994". Bulletin d'Information du Centre de Données Stellaires. 46: 3. Bibcode:1995BICDS..46....3D.
^ Morgan, William Wilson; Keenan, Philip Childs; Kellman, Edith (1943). "An atlas of stellar spectra, with an outline of spectral classification". Chicago. Bibcode:1943assw.book.....M.

Constellation of Lynx

Stars

Bayer	α ψ¹⁰ Aur (16)
Flamsteed	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 (Alsciaukat) 32 33 34 35 36 38 42 43 44 Cam 45 Cam 46 Cam 48 Cam 50 Cam 52 Cam 54 Cam 5 LMi 10 UMa 19 UMa
Variable	R T U Y RR SW SZ TT TV TZ UU UV UX UY AN BE BF BH BK CC CY DD DI DU
HR	2463 2486 2561 2642 2645 2721 2737 2751 2776 2804 2844 2894 2903 2914 2915 2935 2939 3028 3039 3094 3106 3130 3175 3181 3200 3246 3258 3277 3287 3292 3309 3348 3351 3360 3509 3511 3545 3546 3580 3586 3612 3625 3686 3701 3809
HD	44061 52859 58681 59721 59826 63588 63630 65392 67539 75898 (Stribor)
Other	GD 98 Gliese 277 GJ 1105 GJ 3421 HS 0702+6043 IRC +60169 J0815+4729 PG 0859+415 WASP-13 (Gloas) XO-2 XO-4 (Koit) XO-5 (Absolutno)

Exoplanets	6 Lyncis b WASP-13b (Cruinlagh) XO-2Nb XO-4b (Hämarik) XO-5b (Makropulos)

Star clusters	NGC 2666

Nebulae	Jones-Emberson 1 Lynx Arc

Galaxies

NGC	2273 2273B 2308 2315 2320 2321 2322 2326 2326A 2329 2330 2332 2337 2340 2344 2415 2424 2426 2429 2429A 2429B 2431 2444 2445 2446 2456 2457 2458 2461 2462 2463 2468 2469 2472 2473 2474 2475 2476 2484 2488 2493 2495 2497 2500 2505 2518 2519 2521 2524 2528 2532 2534 2537 2537A 2541 2543 2549 2552 2638 2649 2668 2683 2691 2704 2712 2719 2719A 2724 2746 2755 2759 2770 2776 2778 2779 2780 2782 2785 2793 2798 2799 2823 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2838 2839 2840 2844 2852 2853 2860
Other	3C 171 APM 08279+5255 SDSS J082535.19+512706.3 IC 2233 IRAS 09104+4109 UGC 4653 UGC 4881 UGC 4904

NGC