Researchers have found that the weight of ‘Sophie’ the Stegosaurus was around 1,560kg that is equivalent to a large cow, a Beluga whale or a small caravan. Sophie used to live 150 million years ago during the Late Jurassic period.

London's Natural History Museum unveiled Sophie, in December 2014, becoming the latest fossil in its collection.

Sophie was discovered in 2003 at the Red Canyon Ranch in Wyoming, United States and is one of the most complete Stegosaurus fossils that are found ever and are made up of 360 bones.

Researchers at the Natural History Museum along with a UK-based team analyzed the dinosaur. The UK-based team individual digitally scanned each of her bones.

The researchers have mentioned that now they have accurately established Sophie's body mass. It can prove helpful to them in working out more about her life and habitat during the Late Jurassic period.

In the Royal Society Biology Letters, researchers wrote, "Body mass is an important character of an animal, but is difficult to calculate for fossils. Previous techniques used the relationship between mass and leg bone circumference in modern animals to estimate the mass of giant dinosaurs and bizarre fossil mammals".

There is one more way through which the body mass can be calculated. It is the creation of 3D models of fossils and the wrapping shapes around their skeletons in order to make estimation.

However, both the cases prove problematic as they provide vastly different values for the same animal. For example, according to the limb dimension technique, Sophie weighed in at between 2,355kg and 3,751kg.

So the team of researchers combined the both techniques to find a mass that suited both. They found that Sophie the Stegosaurus weighed the same as a Beluga whale or a small caravan at 1,500kg.

The Natural History Museum's Charlotte Brassey told IBTimes UK that the body mass estimated by them does make intuitive sense when you stand next to the specimen in the museum.

He said that Sophie obviously wasn’t as big as an elephant, and was closer in size to a rhino, so it is must that their analytical methods and their common-sense meet on to the same result.

The researchers mentioned that the weight noted by them is 95% accurate, with low and high estimation ranging between 1,082kg and 2,256kg.