Observatory Osokorky   ✧ Обсерваторія Осокорки

Osokorky district, Kyiv, UKRAINE

Using a small telescope (see Equipment), I've been carrying out observation of variable stars. As a side result, new variables have been found, see the list beneath (PMAK V1 .. PMAK V31). More detailed information for some of them can be found in the Variables section.

Many variables in the list below were discovered while data mining the ”Transiting Exoplanet Survey Satellite” (TESS) observations.

These variables have been registered in the International Variable Star Index (VSX), the most comprehensive database of known variable stars.

VSX submissions: discovered, revised, and added variable stars by PMAK (AAVSO)

Variables, discovered using PMAK's observations

PMAK V152 - EA+BY [arXiv] 

PMAK V151 - SPB [arXiv]

PMAK V150 - EA+BCEP: [arXiv]

PMAK V149 - DSCT [arXiv]

PMAK V148 - ROT [arXiv]

PMAK V147 - ELL [arXiv]

PMAK V136 - GDOR [blog]

PMAK V31 - BY [blog]

PMAK V30 - SRS

PMAK V29 - SR

PMAK V28 - SRB

PMAK V27 - BY [blog] 

PMAK V26 - EA [blog]

PMAK V25 - SRD

PMAK V24 - SRS

PMAK V23 - EB

PMAK V22 - EA [blog]

PMAK V21 - DSCT

PMAK V20 - SRS

PMAK V19 - RS

PMAK V18 - EA

PMAK V17 - SRS

PMAK V16 - ELL

PMAK V15 - SRB

PMAK V14 - EA

PMAK V13 - EW

PMAK V12 - SRB

PMAK V11 - EW

PMAK V10 - RS

PMAK V9 - SRD

PMAK V8 - SR

PMAK V7 - SRB

PMAK V6 - RS

PMAK V5 - EA

PMAK V4 - SRB

PMAK V3 - SRS

PMAK V2 - SRB

PMAK V1 - EW

Variables, discovered while data-mining

PMAK V146 - EA Detected with TESS QLP data.

PMAK V145 - EA Detected with TESS QLP data.

PMAK V144 - GDOR Detected with TESS QLP data and PMAK observations.

PMAK V143 - ROT: Detected with TESS QLP data.

PMAK V142 - EA Detected with TESS QLP data.

PMAK V139 - EA Detected with TESS QLP data.

PMAK V138 - EA Detected with TESS QLP data.

iot Del (PMAK V135) - EA Detected with TESS QLP data. Naked-eye star.

PMAK V134 - EA Detected with TESS QLP data.

PMAK V133 - EA Detected with TESS data.

PMAK V132 - EA+GDOR Detected with TESS data.

PMAK V131 - EA Detected with TESS QLP data.

PMAK V128 - EB: Detected with TESS QLP data.

PMAK V127 - EA+ROT Detected with TESS QLP data.

PMAK V126 - EA Detected with TESS QLP data.

PMAK V125 - EA Detected with TESS data.

PMAK V124 - EA+ROT Detected with TESS data.

PMAK V123 - EA Detected with TESS data.

PMAK V122 - EA Detected with TESS QLP data.

PMAK V121 - EA Detected with TESS QLP data.

19 Lyn A (PMAK V120) - ELL Detected with TESS data. Naked-eye star.

PMAK V119 - EA Detected with TESS data.

PMAK V118 - EA Detected with TESS data.

PMAK V117 - EA Detected with TESS QLP data.

PMAK V116 - EA Detected with TESS data.

PMAK V115 - EA+DSCT Detected with TESS data. Naked-eye star.

PMAK V114 - EA Detected with TESS QLP data.

PMAK V113 - EA+BY Detected with TESS QLP data.

PMAK V112 - EA Detected with TESS QLP data.

kap Ari (PMAK V111) - HB Microvariable by TESS QLP data. Naked-eye star.

PMAK V110 - EA Detected with TESS QLP data.

PMAK V109 - EA Detected with TESS QLP data.

PMAK V108 - EA Detected with TESS QLP data.

PMAK V107 - EA/GS+HB Detected with TESS QLP data.

PMAK V106 - EA+ROT Detected with TESS QLP data.

PMAK V105 - EA Detected with TESS QLP data.

PMAK V104 - EA+HB Detected with TESS QLP data.

PMAK V103 - EA Detected with TESS QLP data. Possible shortening of the period.

PMAK V102 - SXARI/E: Detected with TESS QLP data.

PMAK V101 - EA Detected with TESS QLP data.

PMAK V100 - EA Detected with TESS QLP data. An eccentric system with apsidal motion.

PMAK V99 - EA Detected with TESS QLP data. Possible period change!

PMAK V98 - EA+GDOR Detected with TESS QLP data.

PMAK V97 - ELL Detected with TESS QLP data.

PMAK V96 - EA Detected with TESS QLP data.

PMAK V95 - EA Detected with TESS QLP data.

28 Lyn (PMAK V94) - EA Detected with TESS QLP data. V= 6.36m in the maximum, almost naked-eye star.

PMAK V93 - EA Detected with TESS QLP data.

PMAK V92 - EA+HB Detected with TESS data.

PMAK V91 - HADS Detected with TESS QLP data. The original ASAS-SN discovery (ASASSN-V J161209.83+651332.4) was assigned to a contaminated nearby star.

PMAK V90 - EA Detected with TESS QLP data.

PMAK V89 - DSCT Detected with TESS QLP data.

PMAK V88 - EB Detected with TESS QLP data.

PMAK V87 - EA Detected with TESS QLP data. Possible increase of orbital period.

PMAK V86 -  EA+HB+DSCT Detected with TESS QLP data.

HD 111456 (PMAK V85) - ROT Microvariable by TESS QLP data. Naked-eye star.

PMAK V84 -  ELL Detected by TESS QLP data.

PMAK V83 -  EA+ROT Detected with TESS QLP data.

HD 158148 (PMAK V82) -  EA+SPB Microvariable by TESS data. Naked-eye star.

PMAK V81 -  EA Detected with TESS data.

PMAK V80 -  EA Detected with TESS QLP data.

PMAK V79 -  EA Detected with TESS data.

PMAK V78 -  EA Detected with TESS data.

PMAK V77 -  HB Microvariable by TESS data.

PMAK V76 -  EA Detected with TESS data.

PMAK V75 -  EA Detected with TESS data.

PMAK V74 -  EA+ROT Detected with TESS data.

PMAK V73 -  EA+ROT Detected with TESS data.

PMAK V72 -  EA Detected with TESS data.

PMAK V71 -  HB Microvariable by TESS data.

PMAK V70 -  EA+ROT Detected with TESS data. Possible increase of orbital period.

PMAK V69 -  EA Detected with TESS data. Min I by SuperWASP, Min II by TESS.

PMAK V68 -  EA Detected with TESS data.

PMAK V67 -  HB Microvariable by TESS data.

PMAK V66 - EA+DSCT+ROT:  Detected with TESS data.

PMAK V65 -  EA Detected with TESS data.

PMAK V64 -  EA Detected with TESS data.

TIC 284350181 (PMAK V63) -  EA Detected with TESS data.

PMAK V62 -  EA Detected with TESS data.

PMAK V61 -  EA Detected with TESS data.

PMAK V60 -  EA Detected with TESS data.

PMAK V59 -  EA+BY Detected with TESS data.

PMAK V58 -  BCEP Detected with TESS data.

TIC 279236955 (PMAK V57) -  BCEP Detected with TESS data.

PMAK V56 -  HB Microvariable with TESS data.

26 Vul (PMAK V55) -  HB Microvariable with TESS data.

PMAK V54 -  EA Detected with TESS data.

PMAK V53 -  HB Microvariable with TESS data.

PMAK V52 -  EA Detected with TESS data.

PMAK V51 -  EA Detected with TESS data.

PMAK V50 -  EA+BY+UV Detected with TESS data.

PMAK V49 -  DSCT Microvariable by TESS data.

PMAK V48 -  EA+BY+UV Detected with TESS data.

PMAK V47 -  EA+BY Detected with TESS data.

PMAK V46 - EA Detected with TESS data.

PMAK V45 - BY+UV Detected with TESS data.

PMAK V44 - ROT+UV Detected with TESS data.

HD 151613 (PMAK V43) - ROT+EA Detected with TESS data. Naked-eye star.

PMAK V42 - ROT+UV Detected with TESS data.

PMAK V41 - EA+UV Detected with TESS data [article].

PMAK V40 - BY+UV Detected with TESS data.

tet Dra (PMAK V39) - ELL Detected with TESS data. Naked-eye star.

14 Peg (PMAK V38) - R (type changed to HB).  Detected with TESS data. Naked-eye star [article].

TIC 229966103 (PMAK V37) - SPB Detected with TESS data.

PMAK V36 - HB Microvariable by TESS data. Naked-eye star.

PMAK V35 - EA Detected with TESS data.

PMAK V34 - HB Microvariable by TESS data.

PMAK V33 - ACV Microvariable by TESS data.

PMAK V32 - GDOR: (type is uncertain) Microvariable by TESS data.

Revisions

SERIV 161 - hastily designated as EA, new type: CST (non-variable)

NSV 25665 - was [Suspected], new type - EA+GDOR Microvariable by TESS data

HD 125917 - was [Non-variable], new type - DSCT Microvariable by TESS data

NSV 3202 - was [Non-variable], new type - EA+ROT by TESS data

NQ Her - was [Non-variable], new type - EA by TESS QLP, ASAS-3, ASAS-SN, Hipparcos, and AAVSO visual data

V1099 Ori - SXARI Period and epoch from TESS and ASAS-3 data.

NSV 20729 - EA+PULS Period and epoch from TESS QLP. ASAS-3, and Hipparcos data. Additional pulsation variability was found in TESS QLP data.

NSV 14080 -  EA+SPB This star was a 'suspected' variable. TESS QLP data demonstrated narrow minima. The system appeared to be an eccentric eclipsing binary. Type, epoch, eclipse duration, and amplitude from TESS data. The period from TESS, Hipparcos, and NSVS data. Maximum magnitude derived from Hipparcos data. Spectral type from 1971AJ.....76..110H.

V0593 Lyr - HADS Range from ASAS-SN data. Period and epoch from AAVSO, ASAS-SN, SuperWASP, and NSVS data.

DK Cam - EA+SPB Period and epoch (and type) from TESS data.

V1125 Tau - EA Gaia EDR3 position. Period, epoch, and eclipse duration from TESS, ASAS-3 and Hipparcos data. Range from ASAS-3 and Hipparcos data. 

V0405 Dra - EW Light curve elements updated from 2022RNAAS...6..149P, range taken from the AAVSO data. 

V0965 Cep - HADS Light curve elements updated from 2021JAVSO..49...58P, range taken from the AAVSO and ASAS-SN data. 

V0399 Cas - EW  Period and epoch from Gaia DR3, ZTF, ASAS-SN, and AAVSO (PMAK) data. Magnitude range from Gaia DR3 data.

Gaia DR3 1493026087739668736 - EA+ROT  Period, epoch, eclipse duration, and range from ASAS-SN, Gaia DR3, ZTF, and TESS QLP data. Spectral type from 2024ApJS..271...60S. This star was initially detected by Gaia and cataloged in the VSX as an object of unknown variability type (VAR), with an extremely short period of 0.0243543 days. Following a revision, it was reclassified as an EA-type variable star, exhibiting a very narrow eclipse and a significantly longer period of 27.4563 days.

CSS_J102714.3+205943 - HADS  Updated according to https://ui.adsabs.harvard.edu/abs/2025OEJV..260....1P.

Gaia DR3 2148402530483653120 - DSCT  Multiperiodic DSCT. Type, periods, epoch, and amplitude from TESS, PMAK, and Gaia DR3 data. Mean magnitude derived from Gaia DR3 data.

TIC 188625601 - EA  Gaia DR3 position. Maximum magnitude derived from Gaia DR3 data. Spectral type from 1975ascp.book.....H.

Gaia DR3 2145753398952365184 - EW  Range and variability type derived from Gaia DR3, ASAS-SN, and AAVSO (PMAK) data.

Gaia DR3 1903145952125204736 - EA/RS  Type (EA), period, epoch, eclipse duration and range derived from ZTF, Gaia DR3, TESS, and PMAK data.

ATO J083.6339+34.2736 - ELL  Gaia DR3 position. Type, period and epoch from TESS and PMAK data. Range from TESS, PMAK and Gaia DR3 data. Primary name and discoverer from 2018AJ....156..241H.

ATO J090.4252+27.6746 - ELL  Gaia DR3 position. Type, period and epoch from TESS, SuperWASP, and PMAK data. Range from TESS, SuperWASP, PMAK and Gaia DR3 data. Primary name and discoverer from 2018AJ....156..241H.

CzeV1979 - DSCT  Gaia DR3 position. Period, epoch and range from Gaia DR3, TESS, and PMAK data. Secondary period 0.243831 d, epoch HJD 2460282.11.

Gaia DR3 984563704342530176 - GDOR  Type, period, epoch, and range from TESS and Gaia DR3 data.

Gaia DR3 813285390740288512 - EA  Type, period, epoch, range from TESS and Gaia DR3 data. Eclipse durations from TESS data. 

ATO J115.8396+54.0378 - EB:  Type, period and epoch from TESS and Gaia DR3 data. Range derived from TESS and Gaia DR3 data. Primary name and discoverer from 2018AJ....156..241H.

Gaia DR3 919537693322550784 - EA+GDOR  Type, period, epoch, and range from TESS and Gaia DR3 data.

Added known variables, missed in VSX

TIC 154872375 -  EP+ROT: Exoplanet candidate by TESS data

TIC 99920728 -  EA+BY+UV  Variability type revealed using TESS data

1SWASP J175555.34+560207.1  Variability type revealed using TESS data

TIC 233684019 (PMAK V130) - EA Detected by me with TESS QLP data, however, it exists in 2022A&A...666A.142S.

2MASS J21301793+3510301 A nearby star to PMAK V5. It caused a 'noise-like' pattern in my observations and the ASAS-SN data.

TIC 98974882 (PMAK V129) - EA Detected by me with TESS data, however, it exists in 2022ApJS..258...16P.

TIC 80929740 (PMAK V137) - EA+ROT Detected by me with TESS data, however, it exists in 2022ApJS..258...16P.

TIC 191823557 - EW Detected by me with TESS data, however, it exists in 2024A&A...691A.242I.