List of star systems within 65–70 light-years

This is a list of star systems within 6570 light years of Earth.

List

edit
Key
# Visible to the unaided eye
$ Bright star (absolute magnitude of +8.5 or brighter)
White dwarf
§ Brown dwarf or sub-brown dwarf
* Nearest in constellation
System Star or
(sub-) brown dwarf
Distance (ly) Constellation Coordinates:
RA, Dec
(Ep J2000, Eq J2000)
Stellar
class
Apparent magnitude
(V)
Parallax
(mas)
Notes and additional references
HD 7375265.0 ± 1.3Pyxis08h 39m 17.89867s
−22° 39 42.8283
G3V5.17
Gliese 53065.0 ± 1.1HydraG5V6.45
HD 21652065.0 ± 0.8CepheusK0Vhas 2 known exoplanets
GD 35665Draco16h 40m 57.16s
+53° 41 09.6
DC715.06[1]
Aldebaran (Alpha Tauri)$65.1 ± 1.3Taurus04h 35m 55.23907s
+16° 30 33.4885
K5III0.86#has 1 possible planet[2][3][4]
Gliese 123365.2 ± 0.7DracoK0V
Gliese 292.165.2 ± 1.4GeminiK2.5V7.726
Gliese 268.265.2 ± 1.3CarinaKV9.079
GJ 127865.3 ± 1.4CepheusM0.5V9.838
Gliese 32865.3 ± 3.0Hydra08h 55m 07.62173s
+01° 32 47.4151
M0V9.997has 2 known planets
Epsilon Scorpii (Larawag)$65.4 ± 1.1Scorpius16h 50m 09.8s
−34° 17 36
K1III2.310#[2][5]
Gliese 34265.4 ± 1.4DracoK7V
Gliese 747.365.4 ± 2.0LyraK6.5V9.342
53 AquariiA65.5 ± 3.5Aquarius22h 26m 34.2753s
−16° 44 31.697
G1V6.35/6.57[2][6]
BG5V
Gliese 456.165.6 ± 1.3CentaurusK4V8.438
HD 11081065.6 ± 1.3CruxK4V7.843
RR CaeliA65.65 ± 1.72Caelum04h 21m 05.563s
−48° 39 07.06
DA7.814.40has 1 known planet[7]
BM6V
Alpha CaeliA$65.7 ± 0.7Caelum04h 40m 33.71251s
−41° 51 49.5045
F2V4.456/12.5#[2][8]
BM0.5
81 CancriA65.7 ± 1.4Cancer09h 12m 17.547s
+14° 59 45.78
G8V6.77[9][10]
BK1V
CL8
DL8
Gliese 762.265.7 ± 1.3GV
HD 13692365.7 ± 1.2KV
HD 14980665.7 ± 1.2KV
Hamal (Alpha Arietis)$65.9 ± 1.3Aries02h 07m 10.40570s
+23° 27 44.7032
K1IIIb2.00#has 1 known planet[11][12]
GJ 362065.9 ± 1.7KV
Gliese 765.465.9 ± 1.1KV
GJ 329365.91 ± 0.03Eridanus04h 28m 35.71911s
−25° 10 09.2979
M2.511.96Has 4 exoplanets.
DENIS-P J1228.2-154766.0 +2.6
−2.4
Corvus12h 28m 15.232s
−15° 47 34.23
L5.5[13]
Kappa Tucanae66.04 ± 1.2Tucana01h 15m 46.0891s
−68° 52 33.401
F6IV4.25[14]
HD 12840066.1Apus*G6V
HR 885366.1 ± 0.8Cassiopeia23h 16m 42.304s
+53° 12 48.51
FV
Gliese 19966.1 ± 3.0KV
Gamma Doradus66.2 ± 0.7Dorado04h 16m 01.58662s
−51° 29 11.9327
F0V4.25[15]
Gliese 836.866.2 ± 2.0KV
WISE 0413-475066.2T9
Gliese 221A66.3 +2.3
−2.1
Orion05h 53m 00.285s
−05° 59 41.44
K7V9.69has 3 known planets[16]
BM0V
Gliese 84066.3 ± 1.3KV
GJ 200166.3 ± 1.1KV
Tau CygniA66.4 ± 0.8Cygnus21h 14m 47.4916s
+38° 02 43.141
F2IV3.80/6.69[17]
BG0V
GJ 386366.4 ± 0.9GV
Gliese 55866.4 ± 1.8KV
HR 634966.5 ± 1.2FV
9 Ceti66.5 ± 1.3Cetus00h 22m 51.788s
−12° 12 33.97
G3V6.39[18]
Gliese 257.166.6 ± 1.3KV
GJ 106966.6 +6.7
−5.6
KV
HD 11478366.6 ± 1.5Virgo13h 12m 43.78556s
−02° 15 54.1307
K0V7.57Has 2 known planets[19]
DK Leonis66.6 ± 2.4LeoKV
Sigma² Ursae MajorisA66.7 ± 0.9Ursa Major09h 10m 23.538s
+67° 08 02.44
F7IV4.85/8.16
BK2V
HD 3050166.7 ± 0.9KV
GJ 971466.7 ± 2.4KV
HR 853166.8 ± 0.8FV
HD 11461366.8 ± 1.1Centaurus13h 12m 03.18430s
−37° 48 10.8799
G3IV4.852has 2 known planets[19][20][21]
GJ 126266.8 ± 1.1GV
Gliese 783.266.8 ± 1.3KV
GJ 117266.9 ± 2.3KV
GJ 335866.9 ± 1.4KV
HD 15571267.0 ± 1.4KV
HR 884367.1 ± 0.8FV
Gliese 21767.1 ± 1.4KV
Gliese 330.167.2 ± 1.8MV
WISE 0123+414267.2T7
WISE 0625+564667.2T6
GJ 359367.3 ± 1.2GV
HD 33251867.3 ± 1.7KV
HD 24496A67.4 ± 1.5Taurus03h 54m 28.03326s
+16° 36 57.7897
G7V6.822has 1 known planet[22]
BM2V
Gliese 808.267.4 ± 2.6KV
CR Draconis67.4 ± 1.7DracoMV
94 AquariiA67.6 +8.3
−6.6
Aquarius23h 19m 06.7257s
−13° 27 31.615
G8.5IV5.19/7.52[23][24]
BK2V
GJ 110867.6 +4.7
−4.2
KV
HIP 10553367.6 ± 2.3MV
Gliese 53.167.7 ± 1.5KV
GJ 108467.7 ± 1.5KV
GJ 100867.7 ± 2.5KV
Gliese 3067.7 ± 1.5KV
Gliese 54467.8 ± 1.6KV
GJ 128067.9 ± 1.5KV
HD 10406767.9 ± 1.5Corvus11h 59m 10.00884s
−20° 21 13.6121
K3V7.93has 2 known planets[25][26] and 1 candidate
Gliese 900A68 ± 0.0323h 35m 00.27674s
+01° 36 19.4347
K5-79.546[27][28][29][30] has 1 known exoplanet
BM3-4
CM5-6
17 CygniA68.0 ± 0.8Cygnus19h 46m 25.600s
+33° 43 39.35
F7V5.00[31][32]
BM0.4
HR 733068.0 ± 1.9GV
Gliese 53368.0 ± 2.6KV
HR 763168.1 ± 0.5FV
HR 568.2 ± 1.3Cassiopeia00h 06m 15.81387s
+58° 26 12.1073
GV
Gliese 41568.2 ± 2.8KV
WISE 0821+144368.2T5.5
Theta Draconis68.3 ± 0.8Draco16h 01m 53.34636s
+58° 33 54.9056
F9V4.1190[33][34]
13 CetiA68.3 ± 1.8Cetus00h 35m 14.87968s
−03° 35 34.2367
F6V
BK3.5V
CG4V
HR 726068.3 ± 1.1GV
HD 3356468.4 ± 0.8Camelopardalis05h 22m 33.5306s
+79° 13 52.143
F6V5.095has 1 known planet[35]
Gliese 37168.4 ± 2.3KV
HD 22022168.4 ± 1.4KV
HR 801368.5 ± 1.4FV
Gliese 59.168.5 ± 0.9GV
HR 791468.5 ± 1.1GV
HD 11980268.5 ± 1.7KV
Gliese 49168.5 ± 1.3KV
HD 21625968.6 ± 1.7KV
Gliese 39668.6 ± 0.9KV
HD 12458068.7 ± 1.2FV
71 Orionis68.9 ± 1.3Orion06h 14m 50.94s
+19° 09 24.8
FV
Gliese 88968.9 ± 2.8KV
VHS J1256−1257A69.0 ± 0.7Corvus12h 56m 02.1337s
−12° 57 21.924
M7.5 ± 0.517.759 ± 0.059
BL7.0 ± 1.5
40 Leonis69.0 ± 1.2Leo10h 19m 44.16688s
+19° 28 15.2943
F6IV4.80[36]
51 Arietis69.0 ± 1.3Aries03h 02m 26.02628s
+26° 36 33.2602
G8V6.623[37][38]
Gliese 33669.0 +4.5
−4.0
MV
I Puppis69.1 ± 0.8Puppis07h 12m 33.62514s
−46° 45 33.4966
FIV
V774 Tauri69.1 ± 1.6TaurusGV
GJ 116569.1 ± 2.9KV
Gliese 65969.2 ± 2.9KV
Gliese 27669.3 ± 1.9KV
GJ 104869.3 ± 1.6KV
HD 21027769.4 ± 1.2Aquarius22h 09m 29.8658s
−07° 32 55.162
G0IV6.63has 1 known planet[39][40]
HR 357869.5 ± 1.5FV
Gliese 155.269.5 ± 1.4KV
HD 9765869.5 ± 1.5Leo11h 14m 33.1613s
+25° 42 37.392
K1V6.27has 1 known planet[41]
Gliese 12269.5 ± 2.1MV
50 Persei69.6 ± 1.2Perseus04h 08m 36.61660s
+38° 02 23.0488
F7V5.52[42][43]
HR 507069.6 ± 0.8GV
GJ 391769.6 ± 1.6GV
Iota Virginis (Syrma)69.8 ± 1.3Virgo14h 16m 00.868s
−06° 00 01.97
F7IV4.07[44][45]
HR 3220 (B Carinae)69.8 +5.4
−4.7
Carina08h 09m 00.56958s
−61° 18 08.5836
F6V4.75[2][42]
HD 1008669.8 ± 1.2GIV
GJ 325769.8 ± 1.5GV
16 CygniA69.8 ± 0.8Cygnus19h 41m 48.9535s
+50° 31 30.220
G1.5Vb5.96/6.20Has 1 confirmed exoplanet (16 Cygni Bb).[46][47]
BG2.5Vb
CM
HD 9294569.8 ± 1.0Hydra10h 43m 28.2716s
−29° 03 51.433
K1V7.76[48]
Gliese 857.169.8 ± 2.6KV
GJ 425469.8 +14.1
−10.1
MV
WISE 0448-193569.8T5 pec
Kappa ReticuliA69.9 ± 0.7Reticulum03h 29m 22.67742s
−62° 56 15.1042
F5V4.71
BKV
V775 Herculis69.9 ± 1.6HerculesKV
System Star or
(sub-) brown dwarf
Distance (ly) Constellation Coordinates:
RA, Dec
(Ep J2000, Eq J2000)
Stellar
class
Apparent magnitude
(V)
Parallax
(mas)
Notes and additional references

See also

edit

References

edit
  1. Brinkworth, C. S.; Burleigh, M. R.; Wynn, G. A.; Marsh, T. R. (2004). "2004MNRAS.348L..33B Page L33". Monthly Notices of the Royal Astronomical Society. 348 (3). arXiv:astro-ph/0312311. Bibcode:2004MNRAS.348L..33B. doi:10.1111/j.1365-2966.2004.07538.x. S2CID 15677179.
  2. 1 2 3 4 5 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
  3. Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
  4. Hatzes, A. P.; Cochran, W. D.; et al. (2015). "Long-lived, long-period radial velocity variations in Aldebaran: A planetary companion and stellar activity". Astronomy & Astrophysics. 580: A31. arXiv:1505.03454. Bibcode:2015A&A...580A..31H. doi:10.1051/0004-6361/201425519. S2CID 53324086.
  5. Gutierrez-Moreno, Adelina; Moreno, Hugo (June 1968), "A photometric investigation of the Scorpio-Centaurus association", Astrophysical Journal Supplement, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168
  6. Pasquini, L.; Liu, Q.; Pallavicini, R. (July 1994), "Lithium abundances of nearby solar-like stars", Astronomy and Astrophysics, 287 (1): 191–205, Bibcode:1994A&A...287..191P.
  7. "RR Cae B".
  8. GJ 174.1 B -- Flare Star, database entry, SIMBAD. Accessed on line November 5, 2009.
  9. Richichi, A.; et al. (2000). "New binary stars discovered by lunar occultations. V". Astronomy and Astrophysics. 361: 594. Bibcode:2000A&A...361..594R.
  10. Burgasser, Adam J.; et al. (2006). "Multiplicity among Widely Separated Brown Dwarf Companions to Nearby Stars: Gliese 337CD". The Astronomical Journal. 129 (6): 2849–2855. arXiv:astro-ph/0503379. Bibcode:2005AJ....129.2849B. doi:10.1086/430218. S2CID 16980949.
  11. Johnson, H. L.; et al. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
  12. Schneider, Jean (2011), "Notes for Planet alf Ari b", Extrasolar Planets Encyclopaedia, retrieved 2011-10-12
  13. Dupuy, Trent J.; Liu, Michael C. (2012). "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition". The Astrophysical Journal Supplement. 201 (2): 19. arXiv:1201.2465. Bibcode:2012ApJS..201...19D. doi:10.1088/0067-0049/201/2/19. S2CID 119256363.
  14. "Kappa Tucanae - Double or Multiple Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 24 October 2013.
  15. Gamma Doradus Stars: Defining a New Class of Pulsating Variables, Anthony B. Kaye et al., Publications of the Astronomical Society of the Pacific 111, #761 (July 1999), pp. 840844, Bibcode:1999PASP..111..840K.
  16. G. Lo Curto; et al. (2013). "The HARPS search for southern extrasolar planets: XXXVI. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone". Astronomy & Astrophysics. 551: A59. arXiv:1301.2741. Bibcode:2013A&A...551A..59L. doi:10.1051/0004-6361/201220415. S2CID 116916728.
  17. "Simbad Query Result". Simbad. Retrieved October 18, 2007.
  18. Torres, C. A. O.; et al. (December 2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695–708. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. S2CID 16080025.
  19. 1 2 A Modern Mean Stellar Color and Effective Temperatures (Teff) # Sequence for O9V-Y0V Dwarf Stars, E. Mamajek, 2011, website
  20. Høg, E.; et al. (2000). The Tycho-2 catalogue of the 2.5 million brightest stars. Vol. 355. pp. 27–30. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889. {{cite book}}: |journal= ignored (help)
  21. Wittenmyer, Robert A.; et al. (2014). "The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs". The Astrophysical Journal. 783 (2): 103. arXiv:1401.5525. Bibcode:2014ApJ...783..103W. doi:10.1088/0004-637X/783/2/103. S2CID 14082923.
  22. Koen, C.; Kilkenny, D.; Van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x.
  23. 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.
  24. Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
  25. Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745–2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441.
  26. Ségransan, D.; et al. (2011). "The HARPS search for southern extra-solar planets. XXIX. Four new planets in orbit around the moderately active dwarfs HD 63765, HD 104067, HD 125595, and HIP 70849". Astronomy and Astrophysics. 535. A54. arXiv:1107.0339. Bibcode:2011A&A...535A..54S. doi:10.1051/0004-6361/200913580. S2CID 119197766.
  27. "The Extrasolar Planet Encyclopaedia — GJ 900 (ABC)b". Extrasolar Planets Encyclopaedia. Paris Observatory.
  28. "GJ 900". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 17, 2024.
  29. Malogolovets, E. V.; Balega, Yu. Yu.; Rastegaev, D. A.; Hofmann, K. -H.; Weigelt, G. (2007-06-01). "GJ 900: A new hierarchical system with low-mass components". Astrophysical Bulletin. 62 (2): 117–124. arXiv:0707.2193. Bibcode:2007AstBu..62..117M. doi:10.1134/S1990341307020034.
  30. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  31. Takeda, Yoichi; et al. (February 2005), "High-Dispersion Spectra Collection of Nearby F--K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards", Publications of the Astronomical Society of Japan, 57 (1): 13–25, Bibcode:2005PASJ...57...13T, doi:10.1093/pasj/57.1.13.
  32. Dhital, Saurav; et al. (June 2010), "Sloan Low-mass Wide Pairs of Kinematically Equivalent Stars (SLoWPoKES): A Catalog of Very Wide, Low-mass Pairs", The Astronomical Journal, 139 (6): 2566–2586, arXiv:1004.2755, Bibcode:2010AJ....139.2566D, doi:10.1088/0004-6256/139/6/2566, S2CID 661494.
  33. "tet Dra -- Spectroscopic binary". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-11-21.
  34. van Leeuwen, F. (November 2007). "Hipparcos, the New Reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Retrieved 2010-11-21.
  35. Galland; Lagrange, A.-M.; Udry, S.; Chelli, A.; Pepe, F.; Beuzit, J.-L.; Mayor, M. (2005). "Extrasolar planets and brown dwarfs around A-F type stars II. A planet found with ELODIE around the F6V star HD 33564". Astronomy and Astrophysics. 444 (2): L21–L24. arXiv:astro-ph/0509112. Bibcode:2005A&A...444L..21G. doi:10.1051/0004-6361:200500176. S2CID 119341964.
  36. SIMBAD, 40 Leonis (accessed 7 October 2012)
  37. Montes, D.; et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, arXiv:astro-ph/0106537, Bibcode:2001MNRAS.328...45M, doi:10.1046/j.1365-8711.2001.04781.x, S2CID 55727428.
  38. Fuhrmann, Klaus (February 2008), "Nearby stars of the Galactic disc and halo - IV", Monthly Notices of the Royal Astronomical Society, 384 (1): 173–224, 176, Bibcode:2008MNRAS.384..173F, doi:10.1111/j.1365-2966.2007.12671.x.
  39. Gonzalez; et al. (1999). "Parent Stars of Extrasolar Planets. IV. 14 Herculis, HD 187123, and HD 210277". The Astrophysical Journal Letters. 511 (2): L111–L114. Bibcode:1999ApJ...511L.111G. doi:10.1086/311847.
  40. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
  41. Van Grootel, V.; Gillon, M.; Valencia, D.; Madhusudhan, N.; Dragomir, D.; Howe, A. R.; Burrows, A. S.; Demory, B.-O.; Deming, D.; Ehrenreich, D.; Lovis, C.; Mayor, M.; Pepe, F.; Queloz, D.; Scuflaire, R.; Seager, S.; Segransan, D.; Udry, S. (1 May 2014). "TRANSIT CONFIRMATION AND IMPROVED STELLAR AND PLANET PARAMETERS FOR THE SUPER-EARTH HD 97658 b AND ITS HOST STAR". The Astrophysical Journal. 786 (1): 2. arXiv:1402.5850. Bibcode:2014ApJ...786....2V. doi:10.1088/0004-637X/786/1/2. S2CID 118777156.
  42. 1 2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", SIMBAD Astronomical Database, Bibcode:1986EgUBV........0M.
  43. Maldonado, J.; et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics, 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948, S2CID 119209183.
  44. Gray, R. O.; Napier, M. G.; Winkler, L. I. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars". The Astronomical Journal. 121 (4): 2148–2158. Bibcode:2001AJ....121.2148G. doi:10.1086/319956.
  45. Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics, 352: 495–507, Bibcode:1999A&A...352..495M
  46. Hauser, H.; Marcy, G. (1999). "The Orbit of 16 Cygni AB". Publications of the Astronomical Society of the Pacific. 111 (757): 321–334. Bibcode:1999PASP..111..321H. doi:10.1086/316328.
  47. Cochran; Hatzes, Artie P.; Butler, R. Paul; Marcy, Geoffrey W.; et al. (1997). "The Discovery of a Planetary Companion to 16 Cygni B". The Astrophysical Journal. 483 (1): 457–463. arXiv:astro-ph/9611230. Bibcode:1997ApJ...483..457C. doi:10.1086/304245. S2CID 119092518.
  48. V* V419 Hya -- Variable of BY Dra type, database entry, SIMBAD. Accessed on line February 2, 2011.