IAU names dwarf planet Eris

September 14, 2006

The International Astronomical Union announces the names Eris for the dwarf planet provisionally named 2003 UB 313 and Dysnomia for its moon.

Thedwarf planet formerly known as 2003 UB 313 received the official designation (136199) Eris, or Eris in short, from the International Astronomical Union on 13 th September 2006. The name was accepted almost unanimously by the Working Group for Planetary System Nomenclature (WGPSN) and the Committee for Small Body Nomenclature (CSBN).

Eris is the second dwarf planet in a sub category of objects of which Pluto is the prototype. The name Eris was proposed by one of the discoverers, Michael Brown ( Caltech, USA). Eris was discovered on 5 th January 2005 by M. E. Brown, C. A. Trujillo, and D. Rabinowitz at the Palomar Observatory.

Eris is a the Greek goddess of discord and strife. She stirs up jealousy and envy to cause fighting and anger among men. At the wedding of Peleus and Thetis, the parents of the Greek hero Achilles, all the gods with the exception of Eris were invited, and, enraged at her exclusion, she spitefully caused a quarrel among the goddesses that led to the Trojan war.

Eris’ moon, formerly known as S/2005 (2003 UB 313) 1 and now known technically as Eris I, has been named Dysnomia. Dysnomia is the Daimon spirit of lawlessness. She is the daughter of Eris, goddess of chaos and strife, and the counterpart to Eunomia who puts an end to the anger of grievous strife. The name Dysnomia was accepted unanimously by the members of the WGPSN. The name was proposed by Mike Brown, a member of the discovery team.

The new designations have been approved by the IAU Division III Organizing Committee and by the IAU Officers.

Source: INTERNATIONAL ASTRONOMICAL UNION

Explore further: Eris' moon Dysnomia

Related Stories

Eris' moon Dysnomia

July 29, 2015

Ask a person what Dysnomia refers to, and they might venture that it's a medical condition. In truth, they would be correct. But in addition to being a condition that affects the memory (where people have a hard time remembering ...

What is the newest planet?

July 7, 2015

With astronomers discovering new planets and other celestial objects all the time, you may be wondering what the newest planet to be discovered is. Well, that depends on your frame of reference. If we are talking about our ...

In the realm of eternal ice

April 23, 2015

On 6 November 2010, the light of the star known as NOMAD1 0856-0015072 in the Cetus constellation dimmed. What had happened? A dwarf planet at the edge of the solar system had moved in front of the distant star - its name: ...

How many planets are in the solar system?

May 28, 2013

I'm just going to warn you, this is a controversial topic. Some people get pretty grumpy when you ask: how many planets are in the Solar System? Is it eight, ten, or more?

Plutoid chosen as name for solar system objects like Pluto

June 11, 2008

Almost two years after the International Astronomical Union (IAU) General Assembly introduced the category of dwarf planets, the IAU, as promised, has decided on a name for transneptunian dwarf planets similar to Pluto. The ...

Recommended for you

Dawn spacecraft sends sharper scenes from Ceres

August 25, 2015

The closest-yet views of Ceres, delivered by NASA's Dawn spacecraft, show the small world's features in unprecedented detail, including Ceres' tall, conical mountain; crater formation features and narrow, braided fractures.

Ceres image: The lonely mountain

August 25, 2015

NASA's Dawn spacecraft spotted this tall, conical mountain on Ceres from a distance of 915 miles (1,470 kilometers).

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.