Singular asymptotic normality of an estimator in the conic section fitting problem. I
Sergiy V. Shklyar · Theory of Probability and Mathematical Statistics · 2016
The conic section fitting problem is considered. True points are assumed to lie on a conic section. The points are observed with additive errors, which are independent and have bivariate normal distribution $N(0, \sigma ^2 I)$ with unknown $\sigma ^2$. We study asymptotic properties of the estimator of conic section parameters introduced by Kukush, Markovsky, and Van Huffel in