This was discovered on March 28th, 2023. Labelled a 'quasi-satellite' and described as 'very eccentric', it's orbit reaches out halfway to Mars and halfway to Venus. It also appears to 'sort-of' orbit earth - hence the label 'quasi-satellite'.
How come our experts have only just spotted this? We have space cameras everywhere! I have often come across stories about a satellite labelled "The Black Knight" that orbits earth. This has always been dismissed as conspiracy theory. Please see the 2nd link below. Hmmmm!