AT 2021ilb
RA/DEC (2000)
12:21:53.124 +04:28:08.70
185.47135 +4.469083
Reporting Group
Discovering Data Source
Discovery Date
2021-04-05 19:34:00.000
Host Name
Discovery Mag
Lorenzo Siciliano
No Data
Light Curves
FilterTel / InstObs-date rangePhotometry
Other-Other_Other2021-04-02 21:06:00 - 2021-04-05 19:34:002
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
2042382021-04-05 19:34:0016OtherOther-Other_Other8100Lorenzo SicilianoI'm not able to do a photometry of the object. Values in the form are random, except exp-time. Instrument is Apo refractor 120/900
2042372021-04-02 21:06:0018.6OtherOther-Other_Other3420Lorenzo Siciliano[Last non detection] Limiting mag. 18.60 mag/arcec^2 (value taken with SQM-L) - urban sky Filter: bayer matrix sensor Instrument: Newton 254/1000
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
1055932021-04-07 09:50:48LorenzoSicilianoLorenzo Siciliano12:21:53.124+04:28:08.702021-04-05 19:34:00.00016Other-PSNIn a picture taken on 2021 april 5th it seems to spot a transient near the core of M61 that it is not detected in a previous image taken on 2021 april 2nd, under similar seeing conditions and quite identical image scale (0.77 arcsec/pix vs 0.86 arcsec/pix) The telescope used is a Apo refractor Skywatcher Equinox 120ed at 900 mm of focal length. Camera used is a ZWO ASI 2600MC pro - bayer matrix sensor. Regards Lorenzo Siciliano
Classification Reports
No Data


Hello all !

I made a picture in the begin of the night... nothing!  Bououou... It was a good mag for me! on't worry! Maybe another time! (Virgo's cluster arrives!!)
I have a look with Stellarium, it seems strange... the 2021 04 05 Lundia was far from M61, 2021 04 06 it was in !!!
I try to join a picture (very bad... focus... but done in 120s at bin 2x2)

Daniel, Vercors, France


Hi Andrea.

What a pity... It seemed so real...

In the picture taken on April 2nd there was nothing...

On April 5 there was a tiny dot...

See the pictures attached...

sorry to everybody...


Sorry Lorenzo Luciano,nothing is visible 2021.04.07.8190, in this positions.

A.Mantero Bernezzo Observatory C77 

Hi Stan.

I've double checked the date and it's correct.

Anyway, the total expoure length is over 2 hours and half. Any asteroid would leave a streak on the picture instead of a point in such a time interval.

Thanks for the suggestion.

If the day should be April 6 instead of April 5, then the asteroid (809) Lundia, magnitude 16.0 is almost at the exact position.