# OQ 530

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BL Lacertae object in the constellation Boötes

OQ 530 The BL Lacertae object OQ 530 Observation data (J2000.0 epoch) Constellation Boötes Right ascension 14h 19m 46.59s[1] Declination +54° 23′ 14.78″[1] Redshift 0.152500[1] Heliocentric radial velocity 45,718 km/s[1] Distance 1.989 Gly Apparent magnitude (V) 15.65 Apparent magnitude (B) 16.17 Characteristics Type Opt. Var. BLLAC[1] Size ~177,600 ly (54.44 kpc) (estimated)[1] Other designations 2MASS J14194660+5423147, 1418+546, CSO 0633, IVS B1418+546, NVSS J141946+542315, PG 1418+546[1]

**OQ 530** is a [BL Lacertae object](/source/BL_Lacertae_object)[2][3][4] located in the constellation of [Boötes](/source/Bo%C3%B6tes). The [redshift](/source/Redshift) of the object is (z) 0.152[1] and it was first discovered in 1978 by [astronomers](/source/Astronomer) who classified the object to be violently variable based on it displaying optical variations.[5]

## Description

OQ 530 is extremely variable, with several outbursts being displayed between 1915 and 1942. Its most prominent outburst was in 1938, when the object underwent a series of violent changes in [brightness](/source/Brightness) levels, reaching a [maximum](/source/Maximum_and_minimum) peak of 12.5 [magnitude](/source/Magnitude_(astronomy)).[5] A brightening phase was detected on the first day of April 1990, followed by a faint state three days later.[6] It is also said that OQ 530 can be classified as a [blazar](/source/Blazar) due to its variability in the [electromagnetic spectrum](/source/Electromagnetic_spectrum).[7]

The host galaxy of OQ 530 is a luminous [disk galaxy](/source/Disc_galaxy)[8][9] based on high resolution imaging, with its [surface brightness](/source/Surface_brightness) profile resembling something like a [lenticular galaxy](/source/Lenticular_galaxy).[10][11]

The radio structure of the galaxy is compact. When observed with [Very Long Baseline Interferometry](/source/Very-long-baseline_interferometry) (VLBI), it is found to have a [radio jet](/source/Astrophysical_jet) extending outwards by 40 [milliarcseconds](/source/Minute_and_second_of_arc) from the radio core and orientated at a [position angle](/source/Position_angle) of 130° by southeast direction.[9][12] The jet structure is mainly complex with an outer component that broadens upon reaching a distance of four milliarcseconds. There are three other components and a compact radio core which displays signs of [polarization](/source/Polarization_(waves)).[13] A hotspot feature with a flat index [spectrum](/source/Spectrum) is also present.[14] Another component is found west from the core with an elongated appearance. Faint radio emission is also surrounding it, indicating a halo feature is present.[12] A 456-day optical period is suggested for the galaxy, which might be accounted for by either a [binary black hole](/source/Binary_black_hole) or a helical jet.[15]

## References

1. ^ [***a***](#cite_ref-ned_1-0) [***b***](#cite_ref-ned_1-1) [***c***](#cite_ref-ned_1-2) [***d***](#cite_ref-ned_1-3) [***e***](#cite_ref-ned_1-4) [***f***](#cite_ref-ned_1-5) [***g***](#cite_ref-ned_1-6) [***h***](#cite_ref-ned_1-7) ["NED Search results for OQ 530"](https://ned.ipac.caltech.edu/byname?objname=3C+454&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1). *NASA/IPAC Extragalactic Database*. Retrieved 2025-11-23.

1. **[^](#cite_ref-2)** Tagliaferri, G.; Ravasio, M.; Ghisellini, G.; Giommi, P.; Massaro, E.; Nesci, R.; Tosti, G.; Aller, M. F.; Aller, H. D.; Celotti, A.; Maraschi, L.; Tavecchio, F.; Wolter, A. (2003-03-01). ["The BL Lacertae objects OQ 530 and S5 0716+714 - Simultaneous observations in the X-rays, radio, optical and TeV bands"](https://www.aanda.org/articles/aa/abs/2003/11/aa3234/aa3234.html). *Astronomy & Astrophysics*. **400** (2): 477–486. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0301117](https://arxiv.org/abs/astro-ph/0301117). [Bibcode](/source/Bibcode_(identifier)):[2003A&A...400..477T](https://ui.adsabs.harvard.edu/abs/2003A&A...400..477T). [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20021916](https://doi.org/10.1051%2F0004-6361%3A20021916). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-3)** Barbieri, C.; Cristiani, S.; Romano, G. (April 1982). ["A study of some compact extragalactic objects"](http://web.archive.org/web/20240903145426/https://ui.adsabs.harvard.edu/abs/1982AJ.....87..616B/abstract). *The Astronomical Journal*. **87**: 616. [Bibcode](/source/Bibcode_(identifier)):[1982AJ.....87..616B](https://ui.adsabs.harvard.edu/abs/1982AJ.....87..616B). [doi](/source/Doi_(identifier)):[10.1086/113136](https://doi.org/10.1086%2F113136). [ISSN](/source/ISSN_(identifier)) [0004-6256](https://search.worldcat.org/issn/0004-6256). Archived from [the original](https://articles.adsabs.harvard.edu/pdf/1982AJ.....87..616B) on 2024-09-03.

1. **[^](#cite_ref-4)** Zhang, Bing-Kai; Dai, Ben-Zhong; Zhang, Li; Cao, Zhen (2010-06-22). ["Multi-band optical variability of BL Lac object OQ 530"](https://doi.org/10.1088/1674-4527/10/7/004). *Research in Astronomy and Astrophysics*. **10** (7): 653–662. [Bibcode](/source/Bibcode_(identifier)):[2010RAA....10..653Z](https://ui.adsabs.harvard.edu/abs/2010RAA....10..653Z). [doi](/source/Doi_(identifier)):[10.1088/1674-4527/10/7/004](https://doi.org/10.1088%2F1674-4527%2F10%2F7%2F004). [ISSN](/source/ISSN_(identifier)) [1674-4527](https://search.worldcat.org/issn/1674-4527).

1. ^ [***a***](#cite_ref-:0_5-0) [***b***](#cite_ref-:0_5-1) Miller, H. R. (July 1978). ["1418+54: a new, violently variable BL Lacertae object"](https://articles.adsabs.harvard.edu/pdf/1978ApJ...223L..67M). *The Astrophysical Journal*. **223**: L67–L70. [Bibcode](/source/Bibcode_(identifier)):[1978ApJ...223L..67M](https://ui.adsabs.harvard.edu/abs/1978ApJ...223L..67M). [doi](/source/Doi_(identifier)):[10.1086/182730](https://doi.org/10.1086%2F182730). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-6)** Carini, M. T.; Miller, H. R.; Goodrich, B. D. (August 1990). ["The timescales of the optical variability of blazars. I - OQ 530"](http://web.archive.org/web/20240903023640/https://ui.adsabs.harvard.edu/abs/1990AJ....100..347C/abstract). *The Astronomical Journal*. **100**: 347. [Bibcode](/source/Bibcode_(identifier)):[1990AJ....100..347C](https://ui.adsabs.harvard.edu/abs/1990AJ....100..347C). [doi](/source/Doi_(identifier)):[10.1086/115518](https://doi.org/10.1086%2F115518). [ISSN](/source/ISSN_(identifier)) [0004-6256](https://search.worldcat.org/issn/0004-6256). Archived from [the original](https://articles.adsabs.harvard.edu/pdf/1990AJ....100..347C) on 2024-09-03.

1. **[^](#cite_ref-7)** Ghosh, K. K.; Ramsey, B. D.; Sadun, A. C.; Soundararajaperumal, S. (March 2000). ["Optical Variability of Blazars"](https://iopscience.iop.org/article/10.1086/313313/fulltext/). *The Astrophysical Journal Supplement Series*. **127** (1): 11–26. [Bibcode](/source/Bibcode_(identifier)):[2000ApJS..127...11G](https://ui.adsabs.harvard.edu/abs/2000ApJS..127...11G). [doi](/source/Doi_(identifier)):[10.1086/313313](https://doi.org/10.1086%2F313313). [ISSN](/source/ISSN_(identifier)) [0067-0049](https://search.worldcat.org/issn/0067-0049).

1. **[^](#cite_ref-8)** G., Abraham, R.; M., McHardy, I.; S., Crawford, C. (October 1991). ["Optical imaging of BL Lac host galaxies"](http://web.archive.org/web/20221107063659/https://ui.adsabs.harvard.edu/abs/1991MNRAS.252..482A/abstract). *Monthly Notices of the Royal Astronomical Society*. **252**. [doi](/source/Doi_(identifier)):[10.1093/mnra](https://doi.org/10.1093%2Fmnra) (inactive 23 November 2025). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711). Archived from [the original](https://articles.adsabs.harvard.edu/pdf/1991MNRAS.252..482A) on 2022-11-07.{{[cite journal](https://en.wikipedia.org/wiki/Template:Cite_journal)}}: CS1 maint: DOI inactive as of November 2025 ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_DOI_inactive_as_of_November_2025)) CS1 maint: multiple names: authors list ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_multiple_names:_authors_list))

1. ^ [***a***](#cite_ref-:1_9-0) [***b***](#cite_ref-:1_9-1) Massaro, E.; Mantovani, F.; Fanti, R.; Maesano, M.; Montagni, F.; Nesci, R.; Sclavi, S.; Tosti, G.; Venturi, T. (2004-09-01). ["VLBI imaging and optical variability of the BL Lac object OQ 530 (B1418+546)"](https://www.aanda.org/articles/aa/pdf/2004/33/aa0353-04.pdf) (PDF). *Astronomy & Astrophysics*. **423** (3): 935–942. [Bibcode](/source/Bibcode_(identifier)):[2004A&A...423..935M](https://ui.adsabs.harvard.edu/abs/2004A&A...423..935M). [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20040353](https://doi.org/10.1051%2F0004-6361%3A20040353). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-10)** ["OQ 530"](http://quasar.square7.ch/fqm/1418+546.html#:~:text=Telescope%20shows%20the%20host%20galaxy%20as%20an%20elongated%20disk%20galaxy%20(image%20inverted)&text=OQ%20530%20is%20a%20radio%20loud%20object,,as%20such,%20it%20has%20been%20catalogued%20by). *Frankfurt Quasar Monitoring*. Retrieved 2025-11-23.

1. **[^](#cite_ref-11)** Wurtz, Ron; Stocke, John T.; Yee, H. K. C. (March 1996). ["The Canada-France-Hawaii Telescope Imaging Survey of BL Lacertae Objects. I. Properties of the Host Galaxies"](https://articles.adsabs.harvard.edu/pdf/1996ApJS..103..109W). *The Astrophysical Journal Supplement Series*. **103**: 109. [Bibcode](/source/Bibcode_(identifier)):[1996ApJS..103..109W](https://ui.adsabs.harvard.edu/abs/1996ApJS..103..109W). [doi](/source/Doi_(identifier)):[10.1086/192271](https://doi.org/10.1086%2F192271). [ISSN](/source/ISSN_(identifier)) [0067-0049](https://search.worldcat.org/issn/0067-0049).

1. ^ [***a***](#cite_ref-:2_12-0) [***b***](#cite_ref-:2_12-1) P., Cassaro; C., Stanghellini; M., Bondi; D., Dallacasa; R., della Ceca; A., Zappalà, R. (November 1999). "Extended radio emission in BL Lac objects. I. The images". *Astronomy and Astrophysics Supplement Series*. **139** (3): 601–616. [arXiv](/source/ArXiv_(identifier)):[astro-ph/9910209](https://arxiv.org/abs/astro-ph/9910209). [Bibcode](/source/Bibcode_(identifier)):[1999A&AS..139..601C](https://ui.adsabs.harvard.edu/abs/1999A&AS..139..601C). [doi](/source/Doi_(identifier)):[10.1051/aas:1999511](https://doi.org/10.1051%2Faas%3A1999511). [ISSN](/source/ISSN_(identifier)) [0365-0138](https://search.worldcat.org/issn/0365-0138).{{[cite journal](https://en.wikipedia.org/wiki/Template:Cite_journal)}}: CS1 maint: multiple names: authors list ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_multiple_names:_authors_list))

1. **[^](#cite_ref-13)** Gabuzda, D. C.; Pushkarev, A. B.; Cawthorne, T. V. (1999). ["1999MNRAS.307..725G Page 725"](https://articles.adsabs.harvard.edu/full/1999MNRAS.307..725G). *Monthly Notices of the Royal Astronomical Society*. **307** (3): 725. [Bibcode](/source/Bibcode_(identifier)):[1999MNRAS.307..725G](https://ui.adsabs.harvard.edu/abs/1999MNRAS.307..725G). [doi](/source/Doi_(identifier)):[10.1046/j.1365-8711.1999.02683.x](https://doi.org/10.1046%2Fj.1365-8711.1999.02683.x). Retrieved 2025-11-23.

1. **[^](#cite_ref-14)** Baghel, Janhavi; Kharb, P; Hovatta, T; Gulati, S; Lindfors, E; S., Silpa (2023-10-17). ["A Kpc-scale radio polarization study of PG BL Lacs with the uGMRT"](https://doi.org/10.1093%2Fmnras%2Fstad3173). *Monthly Notices of the Royal Astronomical Society*. **527** (1): 672–688. [doi](/source/Doi_(identifier)):[10.1093/mnras/stad3173](https://doi.org/10.1093%2Fmnras%2Fstad3173). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-15)** Liu, Yi; Li, Juan; Fan, Jun-Hui (June 2007). ["A Possible 456-Day Optical Period of OQ 530"](https://iopscience.iop.org/article/10.1088/1009-9271/7/3/07/pdf). *Chinese Journal of Astronomy and Astrophysics*. **7** (3): 380–388. [Bibcode](/source/Bibcode_(identifier)):[2007ChJAA...7..380L](https://ui.adsabs.harvard.edu/abs/2007ChJAA...7..380L). [doi](/source/Doi_(identifier)):[10.1088/1009-9271/7/3/07](https://doi.org/10.1088%2F1009-9271%2F7%2F3%2F07). [ISSN](/source/ISSN_(identifier)) [1009-9271](https://search.worldcat.org/issn/1009-9271).

## External links

- [OQ 530 on SIMBAD](https://simbad.cds.unistra.fr/simbad/sim-id?bibyear1=1850&bibyear2=%24currentYear&submit=Display&Ident=%40500237&Name=ICRF+J141946.5%2B542314&bibdisplay=refsum&bibyear1=1850&bibyear2=%24currentYear#lab_bib)

v t e Constellation of Boötes Boötes in Chinese astronomy Boötes Void List of stars in Boötes Stars Bayer α (Arcturus) β (Nekkar) γ (Seginus) δ (Qigong) ε (Izar, Pulcherrima) ζ η (Muphrid) θ ι κ λ (Xuange) μ1 (Alkalurops) μ2 ν1 ν2 ξ ο π ρ (Kalasungsang) σ (Genghe) τ (Tepiamenit) υ φ χ ψ ω Flamsteed 1 2 3 6 (e) 7 9 10 11 12 (d) 13 14 15 18 20 22 (f) 24 (g) 26 31 32 33 34 (Alrumh) 38 (Merga) 39 40 44 (Quadrans) 45 (c) 46 (b) 47 (k) 50 Variable R S T RX ZZ AB BL BP BX BY CE CH CI CN CP CR CX CY (101 Vir) DE EK HN HP HD 118508 118889 122563 125040 125351 (A) 125658 126128 126129 126141 126200 126271 127304 127334 127726 128093 128198 129132 129357 130084 130603 130917 131040 131473 131496 (Arcalís) 132029 132406 132563 134064 134335 135438 135530 135944 141399 Other 2MASS J15031961+2525196 CFBDSIR 1458+10 Gliese 526 HAT-P-4 LHS 2924 PSR J1544+4937 SDSS J1416+1348 SDSS J1433+1011 TVLM 513-46546 WASP-14 WD 1425+540 ZTF J153932.16+502738.8 Exoplanets HAT-P-4b HD 128311 b c HD 132406 b HD 136418 b (Awasis) τ Boötis b TOI-1853 b WASP-14b Star clusters NGC 5466 Galaxies NGC 5008 5248 5251 5416 5490 5500 5504 5508 5514 5523 5529 5532 5533 5535 5539 5541 5544 5545 5548 5557 5559 5562 5579 5582 5591 5601 5603 5609 5613 5614 5615 5624 5629 5630 5641 5642 5653 5665 5676 5681 5682 5683 5698 5714 5722 5752 5753 5754 5755 5772 5778 5784 5790 5820 5821 5829 5837 5857 5875 5876 5886 5888 5896 5929 5930 5966 Numbered I II III Other 3C 295 3C 299 3C 300 3C 303 3C 315 4C 19.44 4C +26.42 7C 1354+2552 Abell 2009 BCG Arp 302 B2 1420+32 B2 1441+26 CEERS-2112 CEERS-93316 CEERS2-588 CLASS B1359+154 Cloverleaf quasar DDO 190 EGS-zs8-1 EGS-z11-R0 EGSY8p7 H1426+428 IC 4397 IC 4461 IC 4462 IC 4481 IC 4516 IRAS 13349+2438 IRAS 14394+5332 IRAS 15206+3342 LEDA 2108986 MACS 1423-z7p64 MACS J1447.4+0827 BCG Maisie's Galaxy Markarian 463 Markarian 471 Markarian 478 MS 1455.0+2232 BCG MS 1512-cB58 NVSS J141343+433945 OQ 172 OQ 530 PG 1411+442 PG 1543+489 PGC 93125 PGC 1470080 PKS 1345+125 PKS 1413+135 QSO B1422+202 RBS 1467 RGZ J145001.5+144747 RGZ J145039.8+441829 SBS 1415+437 SDSS J135646.10+102609.0 SDSS J1430+2303 Teacup galaxy UGC 8669 UGC 9128 UGC 9425 UGC 9684 UGC 9796 ULAS J1342+0928 VV 191 Galaxy clusters Abell 1795 Abell 1991 BoRG-58 IDCS J1426.5+3508 Astronomical events GRB 990123 GRB 080319B SCP 06F6 SN 2003fg SN 2005bc SN 2020tlf Category

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Adapted from the Wikipedia article [OQ 530](https://en.wikipedia.org/wiki/OQ_530) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/OQ_530?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.