BHTOM Targets for 18 May, 2026
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wyrz...@gmail.com
May 18, 2026, 5:35:09 AM (3 days ago) May 18
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Greetings from the BHTOM Automated Newsletter!
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As of 2026-05-18 09:28:52.949943+00:00, these are the new targets added in the last week for observing (importance>=1), sorted by magnitude:
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| AT2026lck | 280.993979 | 1.880128 | 13.6 | 130.0 | Nova | Recurrent nova in the Milky Way |
| AT2026loo | 155.518446 | -10.510631 | 100.0 | 104.0 | TDE | ePESSTO+ target TDE |
In addition, here are some older targets that are currently visible and requested for observations. These targets have an importance>=4, a sun separation>70, and last magnitude<18, sorted by magnitude.
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| TCrB | 239.875676 | 25.920170 | 9.4 | 134.0 | Nova | recurent nova predicted to explode 2024/2025 |
| V1413 Aql | 285.945155 | 16.438048 | 10.4 | 118.0 | Symbiotic star | known symbiotic star for regular monitoring |
| 1H1936+541 (BD+53 2262) | 293.217949 | 53.879297 | 10.6 | 91.0 | XRB | optical counterpart of the Be X-Ray Binary |
| 1H2202+501 (BD+49 3718) | 330.409176 | 50.167954 | 10.8 | 72.0 | XRB | optical counterpart of the Be X-Ray Binary |
| TCP J21220926+4926242 | 320.537548 | 49.440144 | 12.1 | 78.0 | Unknown | Bright FUor or EXor, or in between. |
| AM_Her | 274.055228 | 49.867989 | 12.9 | 102.0 | CV | Target for joint optical-radio observations |
| V1117 Her | 249.776779 | 9.798698 | 13.5 | 147.0 | Unknown | PMS star, Herbig Ae star |
| BL_Lac | 330.680381 | 42.277772 | 13.6 | 73.0 | BL Lac | famous variable blazar |
| SAXJ2103.5+4545 | 315.898792 | 45.751547 | 13.7 | 82.0 | XRB | Be X-ray binary |
| Mrk 817 | 219.092017 | 58.794299 | 13.8 | 101.0 | Unknown | Seyfert 1 AGN |
| KS1947+300 | 297.397850 | 30.208827 | 13.9 | 102.0 | XRB | Be X-ray binary |
| GROJ2058+42 | 314.698071 | 41.776995 | 14.0 | 84.0 | XRB | Be X-ray binary |
| Gaia21fji | 315.992250 | 50.244500 | 14.2 | 80.0 | YSO | Optical monitoring of Gaia- and ZTF-alerted candidate eruptive YSOs |
| Mrk 841 | 226.004963 | 10.437732 | 14.5 | 149.0 | AGN | changinglook AGN |
| IGRJ21343+4738 | 323.584883 | 47.633391 | 14.7 | 76.0 | XRB | Be X-ray binary |
| SN 2026fvx | 183.742221 | 63.787892 | 15.0 | 88.0 | SN | nearby supernova Type Ia |
| AT2025acft | 295.939833 | 40.367889 | 15.0 | 97.0 | Microlensing Event | Candidate long microlensing event from Chinese KATS survey, KATS25V002 |
| SN 2026kie | 163.152190 | 22.931718 | 15.0 | 98.0 | SN | Astro-COLIBRI target |
| SN 2026kid | 228.988442 | 56.308914 | 15.1 | 104.0 | SN | Closeby Type II supernova at 14 Mpc. Strong CSM interaction |
| NGC5683-Seyfert | 218.718578 | 48.661870 | 15.5 | 110.0 | AGN | active nucleus of a nearby galaxy for frequent monitoring |
| SN_2026jlm | 215.416237 | 13.229544 | 15.7 | 142.0 | SN | Nearby Supernova Type Ia |
| AT2026ava | 316.651371 | 14.521939 | 15.7 | 92.0 | Unknown | AGN or TDE, Mag (r) is 16.88 on Jan 20, 2026 |
| ZTF18aarippg | 217.566838 | 23.062372 | 16.1 | 134.0 | QSO | Tick-Tok possibly merging Super Massive Black Hole binary |
| Gaia4323024741104637568 | 292.501025 | 17.933682 | 16.4 | 112.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| SN 2026gwx | 172.045321 | 25.656667 | 16.6 | 104.0 | SN | New nearby SN Ib with a redshift of 0.009 |
| AT2025sqe | 288.715125 | 8.001778 | 16.9 | 120.0 | Unknown | slow galactic very red transient |
| Q0957+561_A | 150.336216 | 55.898776 | 16.9 | 77.0 | QSO | firstly confirmed lensed quasar (double image), image A (top) |
| SN 2026dix | 177.655950 | 55.353589 | 16.9 | 91.0 | SN | Closeby IIb supernova |
| SN 2026fjc | 195.179418 | 37.310053 | 17.0 | 112.0 | SN | SN Ia (according to TNS) |
| SN 2025aico | 172.318154 | 20.585703 | 17.3 | 107.0 | SN | Young SN classified as a II or IIb |
| AT2026bti | 210.693421 | 24.826742 | 17.4 | 130.0 | SN | optical transient |
| Gaia16aoz | 162.115140 | 71.726660 | 17.6 | 77.0 | QSO | QSO with a long-term and short-term variability |
| SDSSJ094533.99+100950.1 | 146.391622 | 10.163917 | 17.8 | 88.0 | QSO | Long term variable quasar for monitoring |
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| GaiaDR3_4263591911398361472 | 289.926500 | -0.049900 | 8.2 | 122.0 | Variable star-other | This target is part of a paper about I am writing a revision for, and I would like to confirm if it is a binary system or not. It has a period of ~1.435 days (if a binary, ~2x1.435 days) |
| HD 98800 | 170.521620 | -24.777768 | 11.3 | 121.0 | YSO | Pre-main sequence quadruple system (AaAb + BaBb) with circumbinary (BaBb) disk to eclipse AaAb |
| ASASSN-26bp | 225.854950 | -63.189410 | 12.4 | 136.0 | Star | Star Undergoing Deep Dimming Events |
| ngc 3783 | 174.757132 | -37.738611 | 13.6 | 125.0 | AGN | Nearby Seyfert 1 galaxy, active galactic nucleus, interesting for X-ray, high cadence data neeeded, potentially flaring |
| V5856 Sgr | 275.217710 | -28.370030 | 13.9 | 142.0 | Nova | CV and Nova outburts |
| V4141 Sgr | 267.599257 | -19.895328 | 14.0 | 149.0 | Symbiotic star | symbiotic star |
| Nova Centauri 2025 | 219.340667 | -58.794667 | 14.2 | 139.0 | Nova | potential nova from ASASSN, V1935 Cen |
| NGC 6814 | 295.669109 | -10.323641 | 14.3 | 121.0 | AGN | Long term monitored AGN |
| IRAS 23226-3843 | 351.350833 | -38.446978 | 14.4 | 83.0 | AGN | changinglook AGN |
| Gaia19dbf | 178.699417 | -64.491850 | 14.9 | 122.0 | Unknown | Possibly a YSO |
| AT2026ayt | 141.847458 | -32.008578 | 14.9 | 98.0 | SN | Type II SN |
| ASASSN-26af | 82.501958 | -66.724833 | 15.2 | 89.0 | Unknown | Undergoing Deep Dimming Events in the LMC |
| SN2026gzx | 178.487196 | -23.162647 | 15.4 | 128.0 | SN | SN Ia, bright nearby supernova |
| AR Sco | 245.447013 | -22.886218 | 15.4 | 169.0 | CV | White Dwarf pulsar |
| AT 2025nlr | 227.013640 | -40.141550 | 15.7 | 158.0 | Nova | Astro-COLIBRI target |
| Nova Sagittarii 2025 no.4 | 270.969917 | -31.456667 | 16.2 | 145.0 | Nova | Nova Sgr 2025 No. 4 is TCP J18035290-3127298 is TCP J18035278-3127240 |
| PMNJ0730-6602 | 112.706495 | -66.038578 | 16.4 | 96.0 | AGN | IAUZ Target |
| ASASSN-25cd | 277.969917 | -28.807539 | 16.4 | 140.0 | Unknown | A Deep, Ongoing, Dipping Event |
| AT2025xvc | 85.526933 | -67.018517 | 16.6 | 89.0 | Nova | possibile bright nova or CV in LMC from GOTO,TNS |
| AT2026lau | 164.921043 | -10.693675 | 16.9 | 113.0 | Unknown | transient optical event near the galactic core |
| Gaia24csq | 286.710270 | -26.939590 | 16.9 | 132.0 | Unknown | potential slowly rising microlensing event |
| AT 2025acve | 270.700667 | -5.976583 | 17.2 | 142.0 | Unknown | Unclassified optical transient discovered by XOSS, potential microlensing event |
| CTCVJ2056-3014 | 314.217286 | -30.244198 | 17.3 | 108.0 | CV | fast spinning WD in a CV |
| Gaia24amo | 249.148921 | -53.749919 | 17.3 | 144.0 | Microlensing Event | candidate microlensing event, with the second peak |
| AT2026kis | 315.044821 | -32.284722 | 17.3 | 108.0 | Unknown | rising bright transient; 16.5 mag in GOTO-L and ATLAS-o band |
| ZTF20abendxc | 281.224708 | -8.538111 | 17.4 | 134.0 | YSO | Possibly eruptive YSO |
| Gaia23cnm | 285.322920 | -18.717130 | 17.4 | 132.0 | Unknown | slow and long rise, possible microlensing or YSO |
| ASASSN-25fd | 187.851667 | -59.119028 | 17.8 | 128.0 | Nova | Nova in Crux, PNV J12312434-5907133 |
Last week's total of images processed: 25411 (24490 with success).
Last week's targets observed:
| camera | target_names |
|---|---|
| Adonis_G2-1600 | TCrB, SN 2026fvx, SN 2026dix |
| AndromedaC14_QHY600M | SN 2026fov, 1H1936+541 (BD+53 2262), TCrB, AT2025acft, SN 2026fvx, 1H2202+501 (BD+49 3718) |
| BIALKOW_ANDOR-DW432 | SN 2026fvx |
| EEye_QHY268M | Q0957+561_A, AT 2025acve, AT2025acft, Gaia24csq |
| HAO68_G2-1600 | SN 2026fvx, SN 2025aico, AT2025acft, SN 2026kid |
| Kryoneri-1.2_Andor-Zyla | ZTF18aarippg, AT2023zgo, Mrk 841, SN 2026fjc, Q0957+561_A, TCrB, SN 2026dix, SN 2026fvx, SN 2026kie |
| LCOGT-CTIO-1m_4K | ASASSN-26cm, OGLE-2026-BLG-0555, ASASSN-26cp, AT2026ayt, OGLE-2026-BLG-0128, Gaia19exe |
| LCOGT-HO-2m_Muscat | V4641 Sgr, KV UMa, V404_Cyg, Cen X-4 |
| LCOGT-MCD-1m_4K | AT2026lck, ASASSN-26cm |
| LCOGT-SAAO-1m_4K | OGLE-2026-BLG-0128, SN2026kmo, OGLE-2026-BLG-0555, Gaia24amo |
| LCOGT-SAAO-40cm_QHY600M | OJ_287 |
| LCOGT-SS-1m_4K | SN2026kmo, ASASSN-26cp |
| LCOGT-SS-2m_Muscat | MAXI J1820+070, XTE J1650-500, Aql X-1, GRO J1719-24, MAXI J1803-298, XTE J1550-564, MAXI J1807+132, XTE J1728-295, MAXI J0556-332, V406 Vul, GX 339-4 |
| LCOGT-Teide-40cm_QHY600M | OJ_287 |
| MOLETAI-80cm_SOPHIA-4096B | Mrk 841, ZTF18aarippg, 8C0716_714 |
| Ostrowik-60-cm_SOFIA_E2V | 2MASS_J22481357+6400230, 8C0716_714 |
| PIWNICE90_C4-16000EC | Gaia22efa, ZTF18aarippg, Gaia24dfc, Gaia23cqg, EECep, SN 2025aico, Gaia24bux, Gaia24cjg, Gaia21fji, Gaia22awp, 8C0716_714 |
| Planetarium_Slaskie_Kepler4040 | GaiaDR3_4015591806678568576, Gaia23cqg |
| ROAD40_QHY600M | Gaia19eyy, CD-34 11794, ASASSN-24fw, WX Cen, Gaia24ccy, HD 312919, EX Lup, S Dor, HD 269840, HD 269953, ASASSN-25db, HZ Pup, HD 269582, TCP J18265456-2719122, ASASSN-21qj, ASASSN-21js, HD 269006, HD 268687, HD269110, ASASSN-25bv, HD 269858, FO_Aqr, Gaia24dhn, HD 98800, V1117 Her, TCrB, Gaia23cpd, OY Mon, Gaia23dnm |
| ROADC14_QHY600M | GaiaDR3_4263591911398361472, ASASSN-26cm, ASASSN-26cp, SN2025ahsa, V1413 Aql, V4141 Sgr, Nova Velorum 2025, V1280 Sco, Nova Sagittarii 2025 no.4, V5856 Sgr, AT 2025nlr, ASASSN-25dh, ASASSN-25ee, AR_Pav, ASASSN-25cy, ASASSN-26bp |
| SUTO-Otivar_ASI1600MM | EECep, TCrB, RUWE 18 star, HD216629, V2894 Cyg |
| Salerno_Observatory_FLI | Mrk 841, Gaia21fji, V1413 Aql, AM_Her, TCP J21220926+4926242, Gaia20cdl, EECep, KS1947+300, TCrB, GROJ2058+42, SAXJ2103.5+4545, AT2025acft, Mrk 817, SN 2026fvx, Gaia24ayd, 8C0716_714, SN 2026kid |
| Seestar-S30 | BL_Lac, 8C0716_714 |
| Seestar-S50 | 2MASS_J22481357+6400230, 2MASS J07202922+4916255, SN 2026fjc, Gaia16ada, AM_Her, SN 2025aico, TCrB, SN_2026jlm, SN 2026fvx, AT 2026hyy, 8C0716_714, SN 2026kid, Gaia21esb |
| TJO_MEIA3 | Gaia24dkk, ZTF18aarippg, GaiaDR3_4263591911398361472, EECep, AM_Her, SN 2025aico, TCrB, SN2024afyu, Gaia23dgt, SN 2026fvx |
| TTT2_FERVOR-M | 2026knt |
| TTT3_COLORS | 313853518009598070, 2dFGRS TGN420Z067 |
| UZPW50_Chile_QHY268PRO | TDE2025bri, Mrk 841, TDE2025aljd, Gaia22alz, ngc 3783, Gaia23dgt, Gaia24bau, SN2013bw, SN2025ahsa, TDE2026amv, AT2026ayt, AT 2024wxb, EX Lup, V4141 Sgr, Gaia24dcm, Nova Centauri 2025, ASASSN-25db, TCP J14264208+0208476, V1725 Sco, ASASSN-26bp, AT2026bti, SN2026gzx, Gaia24ata, Gaia19dbf, AD_Leo, V1280 Sco, RX Vol, AR Sco, Gaia21fhv, PRIME-2025-BLG-0406, Gaia24amo, SN 2026kie, ZTF18aarippg, SN2024adxu, AT 2025acve, Gaia24bjb, HD 98800, ASASSN-25fd, SN 2025aico, V1117 Her, SDSSJ094533.99+100950.1, TCrB, Gaia23dkq, Nova Velorum 2025, Nova Sagittarii 2025 no.4, SN2024afyu, AT 2025nlr, V5856 Sgr |
| UwB_SBIG-4040 | SDSS_J154329.47+335908.6, Q0957+561_A, TCrB, SN_2026jlm, Gaia16aoz, AT2025acft, SN2024afyu, SN 2026fvx, SN 2026kie |
Last week's fits uploads score (sorted by count)
| observatory-user | count |
|---|---|
| Franz-Josef Hambsch (ROAD40_QHY600M) | 18292 |
| Franz-Josef Hambsch (ROADC14_QHY600M) | 3514 |
| Weronika Skrobacz (Seestar-S50) | 621 |
| Agata Wozniak (UZPW50_Chile_QHY268PRO) | 525 |
| Zbigniew Grabowski (Seestar-S50) | 468 |
| Valerio Bozza (Salerno_Observatory_FLI) | 437 |
| Josep Manel Carrasco (TJO_MEIA3) | 210 |
| Kajetan Siennicki (Ostrowik-60-cm_SOFIA_E2V) | 155 |
| Zbigniew Grabowski (Seestar-S30) | 132 |
| Agnieszka Gurgul (PIWNICE90_C4-16000EC) | 126 |
| Konstantina Vrontaki (Kryoneri-1.2_Andor-Zyla) | 95 |
| Franz-Josef Hambsch (AndromedaC14_QHY600M) | 89 |
| Rachel Street (LCOGT-CTIO-1m_4K) | 74 |
| Jan Kåre Trandem Qvam (HAO68_G2-1600) | 59 |
| Justas Zdanavicius (MOLETAI-80cm_SOPHIA-4096B) | 45 |
| Fraser Lewis (LCOGT-SS-2m_Muscat) | 44 |
| Waldemar Ogloza (Planetarium_Slaskie_Kepler4040) | 44 |
| Rachel Street (LCOGT-SAAO-1m_4K) | 40 |
| Wojciech Burzyński (UwB_SBIG-4040) | 37 |
| Michal Zejmo (UZPW50_Chile_QHY268PRO) | 31 |
| Adam Popowicz (SUTO-Otivar_ASI1600MM) | 25 |
| Fraser Lewis (LCOGT-HO-2m_Muscat) | 24 |
| Sjoerd Dufoer (EEye_QHY268M) | 20 |
| Amelia Rzepka (BIALKOW_ANDOR-DW432) | 16 |
| Andżelika Jania (BIALKOW_ANDOR-DW432) | 16 |
| Joysankar Majumdar (LCOGT-CTIO-1m_4K) | 9 |
| Joysankar Majumdar (LCOGT-MCD-1m_4K) | 8 |
| Franky Dubois (Adonis_G2-1600) | 8 |
| Mauritz Wicker (LCOGT-CTIO-1m_4K) | 8 |
| Eduardo Concepcion (TTT2_FERVOR-M) | 7 |
| Lukasz Wyrzykowski (LCOGT-Teide-40cm_QHY600M) | 6 |
| Jacek Drazkowski (Seestar-S50) | 6 |
| Jacek Drazkowski (Seestar-S30) | 6 |
| Mauritz Wicker (LCOGT-SAAO-1m_4K) | 3 |
| Mauritz Wicker (LCOGT-MCD-1m_4K) | 3 |
| Priscila Pessi (LCOGT-SAAO-1m_4K) | 3 |
| Mauritz Wicker (LCOGT-SS-1m_4K) | 3 |
| Priscila Pessi (LCOGT-SS-1m_4K) | 3 |
| Eduardo Concepcion (TTT3_COLORS) | 2 |
| Lukasz Wyrzykowski (LCOGT-SAAO-40cm_QHY600M) | 1 |
| Przemyslaw J. Mikolajczyk (TTT3_COLORS) | 1 |
Top 5 data uploaders!
| name | count |
|---|---|
| Franz-Josef Hambsch | 22081 |
| Weronika Skrobacz | 621 |
| Zbigniew Grabowski | 600 |
| Agata Wozniak | 525 |
| Valerio Bozza | 437 |
Clear skies!
Your BHTOM Team
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