DENIS-P J020529.0−115925

Multiple star in the constellation Cetus

DENIS-P J020529.0−115925A
Observation data Epoch J2000 Equinox J2000
DENIS-P J020529.0−115925 system with Hubble, the primary A is on the upper left Credit: Hubble Space Telescope
Constellation	Cetus
Right ascension	02^h 05^m 29.401^s^[1]
Declination	−11° 59′ 29.67″^[1]
Characteristics
Spectral type	L5.5 + L8 + T0^[2]
Apparent magnitude (J)	14.587^[1]
Astrometry

Proper motion (μ)	RA: 427^[3] mas/yr Dec.: 52^[3] mas/yr
Parallax (π)	50.60 ± 1.50 mas^[4]
Distance	64 ± 2 ly (19.8 ± 0.6 pc)

Other designations
WDS J02055−1159AB, 2MASS J02052940−1159296
Database references
SIMBAD	data

DENIS-P J020529.0−115925 is a brown dwarf system in the constellation of Cetus. It is located 64 light-years (19.8 parsecs) away, based on the system's parallax.^[4] It was first found in the Deep Near Infrared Survey of the Southern Sky.

This is a triple brown dwarf system: objects that do not have enough mass to fuse hydrogen like stars. The two brightest components, designated A and B respectively, are both L-type objects. As of 2003, the two were separated 0.287° along a position angle of 246°.^[2]

Component B was observed as elongated, suggesting a third component. This third component, named C, is a T-type object.^[2] It is separated about 1.9 astronomical units (au) from B, and based on a total mass of 0.1 M_☉, the two may orbit each other every 8 years.^[2]

References

^ ^a ^b ^c Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
^ ^a ^b ^c ^d Bouy, H.; Martín, Eduardo L.; Brandner, W.; Bouvier, J. (2005). "A Possible Third Component in the L Dwarf Binary System DENIS-P J020529.0-115925 Discovered with the Hubble Space Telescope". The Astronomical Journal. 129 (1): 511–517. arXiv:astro-ph/0410226. Bibcode:2005AJ....129..511B. doi:10.1086/426559. S2CID 119336794.
^ ^a ^b Schmidt, Sarah J.; Cruz, Kelle L.; Bongiorno, Bethany J.; Liebert, James; Reid, I. Neill (2007). "Activity and Kinematics of Ultracool Dwarfs, Including an Amazing Flare Observation". The Astronomical Journal. 133 (5): 2258–2273. arXiv:astro-ph/0701055. Bibcode:2007AJ....133.2258S. doi:10.1086/512158. S2CID 4809362.
^ ^a ^b Dahn, C. C.; Harris, Hugh C.; Vrba, Frederick J.; Guetter, Harry H.; Canzian, Blaise; Henden, Arne A.; Levine, Stephen E.; Luginbuhl, Christian B.; Monet, Alice K. B.; Monet, David G.; Pier, Jeffrey R.; Stone, Ronald C.; Walker, Richard L.; Burgasser, Adam J.; Gizis, John E.; Kirkpatrick, J. Davy; Liebert, James; Reid, I. Neill (2002). "Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs". The Astronomical Journal. 124 (2): 1170–1189. arXiv:astro-ph/0205050. Bibcode:2002AJ....124.1170D. doi:10.1086/341646. S2CID 119485007.

Constellation of Cetus

Stars

Bayer	α (Menkar) β (Diphda) γ (Kaffaljidhma) δ ε ζ (Baten Kaitos) η θ ι κ¹ κ² λ μ ν ξ¹ ξ² ο (Mira) A B π ρ σ τ υ φ¹ φ² φ³ φ⁴ χ
Flamsteed	1 2 3 6 7 9 13 14 20 46 49 56 (υ¹) 63 69 75 77 79 81 84 94 25 Ari
Variable	T UV YZ ZZ AY BL DK
HR	10 72 159 228 500
HD	1690 2638 4747 5319 6718 7449 11506 11964 15115 16008 224693 (Axólotl)
Other	2MASS J01225093−2439505 BD-07 436 BD−17 63 (Felixvarela) Cayrel's Star CFBDS J005910.90–011401.3 DENIS-P J020529.0−115925 GD 40 Gliese 105 GJ 1002 GJ 1005 HIP 5158 HIP 11952 LHS 1140 NGC 156 NGC 158 NGC 302 NGC 308 NGC 310 PSR J0108−1431 SDSS J001820.5−093939.2 SDSS J0106−1000 ULAS J003402.77−005206.7 WD J2356−209 WASP-20 WASP-26 WASP-44 WASP-71 (Mpingo) WISE J0254+0223 WHL0137-LS

Exoplanets	79 Ceti b 81 Ceti b 94 Ceti b BD−17 63 b HD 1461 b HD 2638 b HD 5319 b HD 11506 b c HD 11964 b c HD 224693 b HIP 5158 b c HIP 11915 b τ Ceti e f

Nebulae	NGC 246

Galaxies

Messier	77
NGC	17 35 45 47 50 54 59 61 62 64 65 66 73 77 102 107 113 114 116 117 118 120 124 132 135 142 143 144 145 151 154 155 157 161 163 165 166 167 168 170 171 172 173 177 178 179 187 191 192 195 196 197 201 207 209 210 216 217 219 223 227 230 232 235 237 239 244 245 247 255 259 263 268 270 271 273 274 275 276 277 279 283 284 285 286 291 293 297 298 301 303 307 309 320 321 325 327 329 331 333 335 336 337 340 341 342 343 344 345 347 349 350 351 352 353 355 356 357 359 363 364 367 369 377 391 413 417 426 428 429 430 435 442 445 448 450 478 480 481 487 493 497 519 521 533 540 541 545 547 555 560 570 584 585 596 615 622 655 681 690 701 720 747 755 779 800 806 833 838 864 874 880 895 908 936 945 950 960 965 966 985 988 1009 1015 1019 1022 1032 1042 1052 1055 1073 1087 1090 1128 1142 1218 7828 7829
Other	Arp 146 Arp 147 Arp 256 3C 75 Cetus Dwarf HCM-6A HD2 Holmberg 15A HXMM01 IC 21 IC 42 IC 158 IC 1613 IC 1623 MCG -03-04-014 PGC 2456 SDSS J0303-0019 SXDF-NB1006-2 9Spitch Wolf–Lundmark–Melotte