OQ 530
BL Lacertae object in the constellation Boötes
OQ 530 is a BL Lacertae object located in the constellation of Boötes. The redshift of the object is (z) 0.152 and it was first discovered in 1978 by astronomers who classified the object to be violently variable based on it displaying optical variations.
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 levels, reaching a maximum peak of 12.5 magnitude. A brightening phase was detected on the first day of April 1990, followed by a faint state three days later. It is also said that OQ 530 can be classified as a blazar due to its variability in the electromagnetic spectrum.
The host galaxy of OQ 530 is a luminous disk galaxy based on high resolution imaging, with its surface brightness profile resembling something like a lenticular galaxy.
The radio structure of the galaxy is compact. When observed with Very Long Baseline Interferometry (VLBI), it is found to have a radio jet extending outwards by 40 milliarcseconds from the radio core and orientated at a position angle of 130° by southeast direction. The jet structure is mainly complex with an outer component that broadens upon reaching a distance of four milliarcseconds.
The public source identifies “OQ 530” as bL Lacertae object in the constellation Boötes. This brief keeps that definition visible, then builds a research path around Lacertae, object and constellation.
Why this record matters
A short description can identify a subject without explaining its stakes. For “OQ 530”, the useful work is to connect “bL Lacertae object in the constellation Boötes” to the records capable of establishing context and consequence.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 3, 2026. The linked authority identifier is Q137271605. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1978, 1915, 1942 and 1938.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
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The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “OQ 530”, its source revision and the description used here.
- Expand the search: follow OQ 530 primary sources, OQ 530 archive and Lacertae research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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This entry incorporates text from “OQ 530” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.