# HD 111395

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Star in the constellation Coma Berenices

HD 111395 A visual band light curve for LW Comae Berenices, adapted from Strassmeier et al. (1997)[1] Observation data Epoch J2000 Equinox J2000 Constellation Coma Berenices[2] Right ascension 12h 48m 47.048s[3] Declination +24° 50′ 24.82″[3] Apparent magnitude (V) 6.29[2] Characteristics Evolutionary stage main sequence[3] Spectral type G7V[4] B−V color index 0.703±0.002[2] Variable type BY Dra[5] Astrometry Radial velocity (Rv) −8.936±0.0064[6] km/s Proper motion (μ) RA: −334.908 mas/yr[3] Dec.: −105.517 mas/yr[3] Parallax (π) 58.4858±0.0293 mas[3] Distance 55.77 ± 0.03 ly (17.098 ± 0.009 pc) Absolute magnitude (MV) 5.15[2] Details Mass 1.08±0.04[7] M☉ Radius 0.93±0.01[8] R☉ Luminosity 0.799±0.001[8] L☉ Surface gravity (log g) 4.543±0.05[7] cgs Temperature 5,649+38 −17[8] K Metallicity [Fe/H] 0.08±0.02[7] dex Rotational velocity (v sin i) 3.8±0.8[7] km/s Age 1.0[9] or 1.01−1.73[10] Gyr Other designations LW Com, BD+25°2568, FK5 3021, GJ 486.1, HD 111395, HIP 62523, HR 4864, SAO 82511[11] Database references SIMBAD data

**HD 111395** is a single,[12] [variable star](/source/Variable_star) in the northern [constellation](/source/Constellation) of [Coma Berenices](/source/Coma_Berenices). It has the [variable star designation](/source/Variable_star_designation) **LW Comae Berenices**;[5] *HD 111395* is the *[Henry Draper Catalogue](/source/Henry_Draper_Catalogue)* designation. The star has a yellow hue and is just bright enough to be barely visible to the [naked eye](/source/Naked_eye) with an [apparent visual magnitude](/source/Apparent_visual_magnitude) that fluctuates around 6.29.[2] Based upon [parallax](/source/Stellar_parallax) measurements, it is located at a distance of 55.8 [light years](/source/Light_year) from the [Sun](/source/Sun).[3] The star is drifting closer with a [radial velocity](/source/Radial_velocity) of −8.9 km/s.[6] It is a member of the [Eta Chamaeleontis](/source/Eta_Chamaeleontis) stellar kinematic group.[13]

This object is a [G-type main-sequence star](/source/G-type_main-sequence_star) with a [stellar classification](/source/Stellar_classification) of G7V.[4] Klaus G. Strassmeier *et al.* announced their discovery that HD 111395 is a variable star, in 1997.[1] It was given its variable star designation in 2006.[14] It is a [BY Draconis variable](/source/BY_Draconis_variable) that varies in brightness by about 0.10 magnitude over a period of 15.8 days,[5] which is interpreted as the [rotation period](/source/Rotation_period) of the star. (Messina et al. (2003) suspect the actual rotation period may be half that: 7.9 days.[15]) It has an [active](/source/Magnetic_activity) [chromosphere](/source/Chromosphere)[1] and is a source for [X-ray emission](/source/X-ray_astronomy).[16]

The star is around a billion years old with a [projected rotational velocity](/source/Projected_rotational_velocity) of 3.8 km/s.[7] It has slightly above solar [metallicity](/source/Metallicity) − the term astronomers use for the relative abundance of elements other than hydrogen and helium. The mass of the star is 8% greater than the Sun,[7] but it has 93% of the [Sun's radius](/source/Sun's_radius).[8] It is radiating 80% of the luminosity of the Sun from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 5649 K.[8] An [infrared excess](/source/Infrared_excess) indicates a cold [debris disk](/source/Debris_disk) is orbiting the star at a distance of 17.48 [AU](/source/Astronomical_unit) with a mean temperature of 60 K. The disk has an estimated mass of 5.86×10−6 [*M*🜨](/source/Earth_mass).[9]

## References

1. ^ [***a***](#cite_ref-Strassmeier1997_1-0) [***b***](#cite_ref-Strassmeier1997_1-1) [***c***](#cite_ref-Strassmeier1997_1-2) Strassmeier, K. G.; et al. (December 1997), "Photospheric and chromospheric activity of the bright and single G5 dwarf HR 4864 = HD 111395", *Information Bulletin on Variable Stars*, **4538**: 1, [Bibcode](/source/Bibcode_(identifier)):[1997IBVS.4538....1S](https://ui.adsabs.harvard.edu/abs/1997IBVS.4538....1S).

1. ^ [***a***](#cite_ref-Anderson2012_2-0) [***b***](#cite_ref-Anderson2012_2-1) [***c***](#cite_ref-Anderson2012_2-2) [***d***](#cite_ref-Anderson2012_2-3) [***e***](#cite_ref-Anderson2012_2-4) Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". *[Astronomy Letters](/source/Astronomy_Letters)*. **38** (5): 331. [arXiv](/source/ArXiv_(identifier)):[1108.4971](https://arxiv.org/abs/1108.4971). [Bibcode](/source/Bibcode_(identifier)):[2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A). [doi](/source/Doi_(identifier)):[10.1134/S1063773712050015](https://doi.org/10.1134%2FS1063773712050015). [XHIP record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-ref=VIZ681510a8389ecb&-out.src=V%2F137D%2FXHIP&-nav=cat%3AV%2F137D%26tab%3A{V%2F137D%2FXHIP}%26key%3Asource%3DV%2F137D%2FXHIP%26HTTPPRM%3A&-source=V%2F137D%2FXHIP&-out=HIP&HIP=62523&-out=Comp&-out=Gr&-out=RAJ2000&-out=DEJ2000&-out=Dist&-out=X&-out=Y&-out=Z&-out=SpType&-out=Simbad&-out=Hpmag&-out=Lum&-out=Cst) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-GaiaDR3_3-0) [***b***](#cite_ref-GaiaDR3_3-1) [***c***](#cite_ref-GaiaDR3_3-2) [***d***](#cite_ref-GaiaDR3_3-3) [***e***](#cite_ref-GaiaDR3_3-4) [***f***](#cite_ref-GaiaDR3_3-5) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D3957887649746830976%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Gray2006_4-0) [***b***](#cite_ref-Gray2006_4-1) Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I", *The Astronomical Journal*, **132** (1): 161–170, [arXiv](/source/ArXiv_(identifier)):[astro-ph/0603770](https://arxiv.org/abs/astro-ph/0603770), [Bibcode](/source/Bibcode_(identifier)):[2006AJ....132..161G](https://ui.adsabs.harvard.edu/abs/2006AJ....132..161G), [doi](/source/Doi_(identifier)):[10.1086/504637](https://doi.org/10.1086%2F504637), [S2CID](/source/S2CID_(identifier)) [119476992](https://api.semanticscholar.org/CorpusID:119476992).

1. ^ [***a***](#cite_ref-Samus2017_5-0) [***b***](#cite_ref-Samus2017_5-1) [***c***](#cite_ref-Samus2017_5-2) Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", *Astronomy Reports*, 5.1, **61** (1): 80–88, [Bibcode](/source/Bibcode_(identifier)):[2017ARep...61...80S](https://ui.adsabs.harvard.edu/abs/2017ARep...61...80S), [doi](/source/Doi_(identifier)):[10.1134/S1063772917010085](https://doi.org/10.1134%2FS1063772917010085), [S2CID](/source/S2CID_(identifier)) [125853869](https://api.semanticscholar.org/CorpusID:125853869).

1. ^ [***a***](#cite_ref-Soubiran2013_6-0) [***b***](#cite_ref-Soubiran2013_6-1) Soubiran, C.; et al. (April 2013), "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release", *Astronomy & Astrophysics*, **552**: 11, [arXiv](/source/ArXiv_(identifier)):[1302.1905](https://arxiv.org/abs/1302.1905), [Bibcode](/source/Bibcode_(identifier)):[2013A&A...552A..64S](https://ui.adsabs.harvard.edu/abs/2013A&A...552A..64S), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201220927](https://doi.org/10.1051%2F0004-6361%2F201220927), [S2CID](/source/S2CID_(identifier)) [56094559](https://api.semanticscholar.org/CorpusID:56094559), A64

1. ^ [***a***](#cite_ref-McCarthy2014_7-0) [***b***](#cite_ref-McCarthy2014_7-1) [***c***](#cite_ref-McCarthy2014_7-2) [***d***](#cite_ref-McCarthy2014_7-3) [***e***](#cite_ref-McCarthy2014_7-4) [***f***](#cite_ref-McCarthy2014_7-5) McCarthy, Kyle; Wilhelm, Ronald J. (October 2014), "Characterizing the AB Doradus Moving Group via High-resolution Spectroscopy and Kinematic Traceback", *The Astronomical Journal*, **148** (4): 13, [arXiv](/source/ArXiv_(identifier)):[1407.1076](https://arxiv.org/abs/1407.1076), [Bibcode](/source/Bibcode_(identifier)):[2014AJ....148...70M](https://ui.adsabs.harvard.edu/abs/2014AJ....148...70M), [doi](/source/Doi_(identifier)):[10.1088/0004-6256/148/4/70](https://doi.org/10.1088%2F0004-6256%2F148%2F4%2F70), [S2CID](/source/S2CID_(identifier)) [119296096](https://api.semanticscholar.org/CorpusID:119296096), 70.

1. ^ [***a***](#cite_ref-GaiaDR2_8-0) [***b***](#cite_ref-GaiaDR2_8-1) [***c***](#cite_ref-GaiaDR2_8-2) [***d***](#cite_ref-GaiaDR2_8-3) [***e***](#cite_ref-GaiaDR2_8-4) [Brown, A. G. A.](/source/Anthony_Brown_(scientist)); et al. ([Gaia collaboration](/source/Data_Processing_and_Analysis_Consortium)) (August 2018). ["*Gaia* Data Release 2: Summary of the contents and survey properties"](https://doi.org/10.1051%2F0004-6361%2F201833051). *[Astronomy & Astrophysics](/source/Astronomy_%26_Astrophysics)*. **616**. A1. [arXiv](/source/ArXiv_(identifier)):[1804.09365](https://arxiv.org/abs/1804.09365). [Bibcode](/source/Bibcode_(identifier)):[2018A&A...616A...1G](https://ui.adsabs.harvard.edu/abs/2018A&A...616A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201833051](https://doi.org/10.1051%2F0004-6361%2F201833051). [Gaia DR2 record for this source](https://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20DR2%203957887649746830976) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-gaspar2016_9-0) [***b***](#cite_ref-gaspar2016_9-1) Gáspár, András; et al. (2016), "The Correlation between Metallicity and Debris Disk Mass", *The Astrophysical Journal*, **826** (2): 171, [arXiv](/source/ArXiv_(identifier)):[1604.07403](https://arxiv.org/abs/1604.07403), [Bibcode](/source/Bibcode_(identifier)):[2016ApJ...826..171G](https://ui.adsabs.harvard.edu/abs/2016ApJ...826..171G), [doi](/source/Doi_(identifier)):[10.3847/0004-637X/826/2/171](https://doi.org/10.3847%2F0004-637X%2F826%2F2%2F171), [S2CID](/source/S2CID_(identifier)) [119241004](https://api.semanticscholar.org/CorpusID:119241004).

1. **[^](#cite_ref-Vican2012_10-0)** Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", *The Astronomical Journal*, **143** (6): 135, [arXiv](/source/ArXiv_(identifier)):[1203.1966](https://arxiv.org/abs/1203.1966), [Bibcode](/source/Bibcode_(identifier)):[2012AJ....143..135V](https://ui.adsabs.harvard.edu/abs/2012AJ....143..135V), [doi](/source/Doi_(identifier)):[10.1088/0004-6256/143/6/135](https://doi.org/10.1088%2F0004-6256%2F143%2F6%2F135), [S2CID](/source/S2CID_(identifier)) [118539505](https://api.semanticscholar.org/CorpusID:118539505).

1. **[^](#cite_ref-SIMBAD_11-0)** ["HD 111395"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+111395). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2019-11-28.

1. **[^](#cite_ref-Fuhrmann2017_12-0)** Fuhrmann, K.; et al. (2017), "Multiplicity among Solar-type Stars", *The Astrophysical Journal*, **836** (1): 139, [Bibcode](/source/Bibcode_(identifier)):[2017ApJ...836..139F](https://ui.adsabs.harvard.edu/abs/2017ApJ...836..139F), [doi](/source/Doi_(identifier)):[10.3847/1538-4357/836/1/139](https://doi.org/10.3847%2F1538-4357%2F836%2F1%2F139).

1. **[^](#cite_ref-Nakajima2012_13-0)** Nakajima, Tadashi; Morino, Jun-Ichi (January 2012), "Potential Members of Stellar Kinematic Groups within 30 pc of the Sun", *The Astronomical Journal*, **143** (1): 2, [Bibcode](/source/Bibcode_(identifier)):[2012AJ....143....2N](https://ui.adsabs.harvard.edu/abs/2012AJ....143....2N), [doi](/source/Doi_(identifier)):[10.1088/0004-6256/143/1/2](https://doi.org/10.1088%2F0004-6256%2F143%2F1%2F2).

1. **[^](#cite_ref-Kazarovets2006_14-0)** Kazarovets, E. V.; et al. (August 2006), ["The 78th Name-List of Variable Stars"](https://ibvs.konkoly.hu/pub/ibvs/5701/5721.pdf) (PDF), *Information Bulletin on Variable Stars*, **5721**: 1–45, [Bibcode](/source/Bibcode_(identifier)):[2006IBVS.5721....1K](https://ui.adsabs.harvard.edu/abs/2006IBVS.5721....1K), retrieved 8 February 2025.

1. **[^](#cite_ref-Messina2003_15-0)** Messina, S.; et al. (November 2003), "Dependence of coronal X-ray emission on spot-induced brightness variations in cool main sequence stars", *Astronomy and Astrophysics*, **410** (2): 671–684, [Bibcode](/source/Bibcode_(identifier)):[2003A&A...410..671M](https://ui.adsabs.harvard.edu/abs/2003A&A...410..671M), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20031203](https://doi.org/10.1051%2F0004-6361%3A20031203).

1. **[^](#cite_ref-Greiner2015_16-0)** Greiner, J.; Richter, G. A. (March 2015), "Optical counterparts of ROSAT X-ray sources in two selected fields at low vs. high Galactic latitudes", *Astronomy & Astrophysics*, **575**: 67, [arXiv](/source/ArXiv_(identifier)):[1408.5529](https://arxiv.org/abs/1408.5529), [Bibcode](/source/Bibcode_(identifier)):[2015A&A...575A..42G](https://ui.adsabs.harvard.edu/abs/2015A&A...575A..42G), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201322844](https://doi.org/10.1051%2F0004-6361%2F201322844), [S2CID](/source/S2CID_(identifier)) [59501196](https://api.semanticscholar.org/CorpusID:59501196), A42.

v t e Constellation of Coma Berenices List of stars in Coma Berenices Coma Berenices in Chinese astronomy Stars Bayer α (Diadem) β γ Flamsteed 7 11 12 13 14 16 17 21 23 (Phyllon Kissinou) 24 31 35 36 37 41 Variable FK GP IN LW HR 4668 HD 107146 108863 108874 110067 114762 b 115404 116029 Other 2MASS J12195156+3128497 KELT-6 WASP-56 WISE 1217+1626 Exoplanets HD 108874 b c KELT-6b Star clusters Coma Star Cluster Messier 53 NGC 4147 NGC 5053 Nebulae LoTr 5 Galaxies Messier 64 (Black Eye Galaxy) 85 88 91 98 99 100 NGC 4014 4015 4017 4053 4056 4060 4061 4065 4066 4070 4072 4074 4076 4084 4086 4089 4090 4091 4092 4093 4095 4098 4136 4146 4150 4162 4185 4189 4203 4211 4212 4213 4222 4237 4245 4253 4262 4274 4278 4293 4298 4302 4308 4310 4312 4314 4323 4328 4340 4359 4375 4383 4393 4394 4414 4419 4448 4450 4455 4459 4468 4473 4474 4475 4477 4479 4489 4494 4495 4498 4502 4506 4515 4516 4523 4525 4540 4555 4556 4558 4559 4561 4565 4571 4585 4595 4611 4614 4615 4633 4634 4651 4659 4670 4673 4676 (Mice Galaxies) 4689 4692 4710 4712 4725 4747 4839 4848 4860 4869 4871 4872 4873 4874 4875 4876 4881 4883 4886 4889 4892 4895 4907 4911 4919 4921 4944 5000 5004 5012 5032 5056 5172 Other 3C 275.1 3C 287 Arp 60 Coma Berenices Dragonfly 44 IC 755 (NGC 4019) IC 831 IC 860 IC 3505 IC 3528 IC 4040 IC 4051 IOK-1 IRAS F12032+1707 LEDA 83677 M85-HCC1 Malin 1 PGC 44691 PKS 1155+251 PKS 1222+216 VIRGOHI21 ZwCl 1305.4+2941 BCG Galaxy clusters Abell 1413 Coma I Coma Cluster Coma Supercluster M94 Group NGC 4065 Group NGC 4631 Group Astronomical events GRB 050509B iPTF14atg SN 1940B SN 1979C SN 2005ap SN 2006X SN 2020oi Category

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