"Coronaviruses belong to the Coronaviridae family in the Nidovirales order."
Coronaviruses are named for the crown-like spikes on their surface. There are four main sub-groupings of coronaviruses, known as alpha, beta, gamma, and delta. 
Coronaviruses are ubiquitous among humans and animals. These viruses are enveloped, nonsegmented, positive-sense RNA viruses and have
the largest identified viral RNA genomes, with an approximate
length of 30 kilobases.

Coronaviruses

"The order Nidovirales consists of viruses which have positive-sense, single-stranded RNA genomes. As positive-sense genomes, the viruses can use some host cell proteins during replication and gene expression which occurs in the cytoplasm of the host cell."

University of Michigan - Ann Arbor

"The (+)ssRNA viruses are classified into three orders—the Nidovirales, Picornavirales, and Tymovirales—and 33 families, of which 20 are not assigned to an order. A broad range of hosts can be infected by (+)ssRNA viruses, including bacteria (the Leviviridae), eukaryotic microorganisms, plants, invertebrates, and vertebrates."

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