I used a generic table, as there is no brand name on that cap, which was harvested from a 20 year old top of the line CRT Sony TV.
I fed a 5Vpp square wave at 100kHz (50% duty cycle) through it with a 100 Ohm resistor in series. I also measured an AC current of 47 mA on the circuit. Noticed 240 mVpp on the oscilloscope across the cap, which gives me an ESR of about 5 Ohm for that old cap, applying Ohm's law. Not sure if this is the right procedure, but that cap could be out of tolerance, being so old.
47 mA will be RMS ? The 240mVpp over the cap is the impedance so ESR and reactance. 47 mA rms will be 94 mApp. So impedance is around 2.5 Ohm. But that is the complex impedance. But besides that you did not measure ESR this way.
You have to meaure the voltdrop over the ESR, not over the cap. It it the part that drops straight down. First the triangle rises, on a fast scope you then see a spike, the ESL, then it drops straight down, the drop over the ESR ( but corrected for the spike) and then the slope goes down under an angle over the Xc. I'm afraid you meaured ESR and Xc together and mixed up rms and Vpp.
The tables are useless for general use because those are made to compensate for the wrong results of the meters.
Use a 1KHz square, ESL is so small in that case it will not matter. Use coax, T-pieces and in line terminators, no probes, this all to avoid ringing. Measure current paek to peak over a pure resistive dummyload you place between cap and ground. Connect it using a T piece . Use also a T above and below the cap for measuring the voltdrop differential. Voltdrop divided by current is ESR. ( or meaure current differential over a inline resistor above the cap, and measure the cap single ended.
I have a piece on my site about this methode but i made that while ago, corrected it some times when I learned more about this. So some of the math is not excact correct because Later I had not all data needed to correct for some meaurement setups, but the info is for 99 % still OK. I am going to do new meaurements and make a new page with some better compares because i now have the gear to do real excact meaurements as a compare. ( like 0.01% capacitor bridge, vector RF-IV measuement options for both my vnas ect and things like GR reference capacitors with known ESR.
i will post the link here as it is finnished
The old one is at
www.pa4tim.nl and use the searche box to look for ESR. You find the page, it is in Dutch and English with a lot of pictures.