No, 1.83 grams is very light. However, it still looks genuine. I imagine it is very porous and fragile. I recommend you do not test this theory by attempting to bend it--it would probably shatter. You can read more about coins of Maximinus Thrax here: http://esty.ancients.info/Maximinus/Maximinus.html
It seems light, but I do not think it is abnormal. I only own one Max I denarius which weights in at 2.83g. I think your coin looks fine.
Its light but the coin looks OK. Many of his coins were on the light side compared to severus alexander.
While there is a good variation in flan weights that are perfectly normal, one a gram low does make me worry that the coin might have leeched metal out in the time it was in the earth leaving abnormally porous metal. The reverse i particular has a textured look that could mean it was harshly cleaned or naturally exposed to harsh elements. While I do not believe this weight alone is reason for a fake fear, I still would avoid such a coin more in fear of it being fragile. Don't drop any coin. Especially, don't drop this one. With ancients, we have grades like VF but sometimes a more important 'grade' is found in a modifier like 'good metal'. Wear is not the worst thing that can happen to a coin.
I agree with everyone else who has posted already---it looks perfectly fine, just a bit light and probably quite fragile.....treat it with care...
I concur. While its possible this coin was just struck on an abnormally light flan, we should see some evidence of it either too small or weaker strike. Neither of those are apparent, so I also suspect it was a spot find and much of the metal has been leeched away through the centuries.
I have read in a book on Roman coinage that by this time period the denarius was accepted and trafficked at a value irrespective of its metallic, intrinsic value, that is, by then the marketplace no longer expected that the amount of silver in the coin determined its value in commerce, hence a widely varying weight (and composition).
