S-type asteroids are of a stony composition, hence the name. Approximately 17% of asteroids are of this type, making it the second most common after the C-type.

S-types are moderately bright (with an albedo of 0.10 to 0.22) and consist mainly of iron- and magnesium-silicates. They are dominant in the inner asteroid belt within 2.2 AU, common in the central belt within about 3 AU, but become rare farther out. The largest is 15 Eunomia (about 330 km wide across its longest dimension), with the next largest members by diameter being 3 Juno, 29 Amphitrite, 532 Herculina and 7 Iris. These largest S-types are visible in 10x50 binoculars at most oppositions; the brightest, 7 Iris, can occasionally become brighter than +7.0, which is a higher magnitude than any asteroid except the unusually reflective 4 Vesta.

Their spectrum has a moderately steep slope at wavelengths shorter than 0.7 µm, and has moderate to weak absorption features around 1 µm and 2 µm. The 1 µm absorption is indicative of the presence of silicates (stony minerals). Often there is also a broad but shallow absorption feature centered near 0.63 µm. The composition of these asteroids is similar to a variety of stony meteorites which share similar spectral characteristics.

Bartholomew JoJo "Bart" Simpson is a fictional main character in the animated television series The Simpsons and part of the Simpson family. He is voiced by actress Nancy Cartwright and first appeared on television in The Tracey Ullman Show short "Good Night" on April 19, 1987. Bart was created and designed by cartoonist Matt Groening while he was waiting in the lobby of James L. Brooks' office. Groening had been called to pitch a series of shorts based on Life in Hell but instead decided to create a new set of characters. While the rest of the characters were named after Groening's family members, Bart's name was an anagram of the word brat. After appearing on The Tracey Ullman Show for three years, the Simpson family received its own series on Fox, which debuted December 17, 1989.

At ten years old, Bart is the eldest child and only son of Homer and Marge, and the brother of Lisa and Maggie. Bart's most prominent character traits are his mischievousness, rebelliousness and disrespect for authority. He has appeared in other media relating to The Simpsons, including video games, The Simpsons Movie, The Simpsons Ride, commercials, and comic books; he has also inspired an entire line of merchandise. In casting, Nancy Cartwright originally planned to audition for the role of Lisa, while Yeardley Smith tried out for Bart. Smith's voice was too high for a boy, so she was given the role of Lisa. Cartwright found that Lisa was not interesting at the time, so instead auditioned for Bart, which she thought was a better role. Hallmarks of the character include his chalkboard gags in the opening sequence; his prank calls to Moe the bartender; and his catchphrases "Eat my shorts", "¡Ay, caramba!", and "Don't have a cow, man!"

Peter Gene Hernandez (born October 8, 1985), better known by his stage name Bruno Mars, is an American singer-songwriter and record producer. Raised in Honolulu, Hawaii by a family of musicians, Mars began making music at a young age. He performed in various musical venues in his hometown throughout his childhood. He graduated from high school and then moved to Los Angeles, California to pursue a musical career. Mars produced songs for other artists, joining production team The Smeezingtons.

Mars had an unsuccessful stint with Motown Records, but then signed with Atlantic Records in 2009. He became recognized as a solo artist after lending his vocals and co-writing the hooks for the songs "Nothin' on You" by B.o.B, and "Billionaire" by Travie McCoy. He also co-wrote the hits "Right Round" by Flo Rida featuring Ke$ha, and "Wavin' Flag" by K'naan. In October 2010, he released his debut album, Doo-Wops & Hooligans. Anchored by the worldwide number-one singles "Just the Way You Are" and "Grenade", the album peaked at number three on the Billboard 200. Mars was nominated for seven Grammys at the 53rd Grammy Awards, winning Best Male Pop Vocal Performance for "Just the Way You Are".

William James "Bill" Murray (born September 21, 1950) is an American actor, comedian and golfer. He first gained national exposure on Saturday Night Live in which he earned an Emmy Award and later went on to star in a number of critically and commercially successful comedic films, including Caddyshack (1980), Ghostbusters (1984), and Groundhog Day (1993). Murray gained additional critical acclaim later in his career, starring in Lost in Translation (2003), that earned him an Academy Award for Best Actor nomination, and a series of films directed by Wes Anderson, including Rushmore (1998), The Royal Tenenbaums (2001), The Life Aquatic with Steve Zissou (2004) and Moonrise Kingdom (2012).

Murray was born and raised in Wilmette, Illinois, a northern suburb of Chicago, the son of Lucille (née Collins), a mail room clerk, and Edward Joseph Murray II, a lumber salesman. Murray's father died in 1967 from complications of diabetes when Bill was 17 years old. Murray, along with his eight siblings, was raised in an Irish American family. Three of his siblings are actors: John Murray, Joel Murray and Brian Doyle-Murray. A sister, Nancy, is an Adrian Dominican nun in Michigan, who has traveled the United States in a one-woman programme, portraying St. Catherine of Siena.

Melissa Ann McCarthy (born August 26, 1970) is an American film and television actress, comedian, writer and producer.

McCarthy is known for her role as Sookie St. James on the The WB television series Gilmore Girls, where she starred from 2000 to 2007. From 2007 to 2009, she portrayed Dena on the ABC sitcom Samantha Who?. She currently stars in the CBS sitcom Mike & Molly, for which she won an Emmy Award for Outstanding Lead Actress in a Comedy Series in 2011. She is also known for her performances in the films The Nines, The Back-up Plan, Life as We Know It, and her breakthrough role in the 2011 comedy hit Bridesmaids, which garnered numerous award nominations including BAFTA and Academy Award nominations for Best Supporting Actress.

Melissa Ann McCarthy was born in Plainfield, Illinois, the daughter of Sandra and Michael McCarthy. She is a first cousin of actress Jenny McCarthy. McCarthy was raised on a farm, in a Irish-American family. She graduated from St. Francis Academy (now Joliet Catholic Academy) in Joliet, Illinois. Her career started with stand-up comedy and includes film, television and theater. McCarthy is an alumna of The Groundlings, an improvisational and sketch comedy troupe based in Los Angeles, California,