| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 22 May 1998 |
| Designations | |
| (13241) Biyo | |
Named after | Josette Biyo[1] (Filipino educator) |
| 1998 KM41 · 1975 UB1 | |
| main-belt · Flora region background[2] | |
| Orbital characteristics[3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 44.01yr (16,073 d) |
| Aphelion | 2.4215AU |
| Perihelion | 2.1263 AU |
| 2.2739 AU | |
| Eccentricity | 0.0649 |
| 3.43 yr (1,252 d) | |
| 125.48° | |
| 0° 17m 14.64s / day | |
| Inclination | 7.3001° |
| 56.739° | |
| 93.848° | |
| Physical characteristics | |
| 3.9 km(calculated)[4][5] | |
| 4.4±0.4 h[4][6] 2.199±0.219 h(half-period)[6] | |
| 0.24(assumed)[4] | |
| S[4] V–R =0.380±0.03[6] | |
| 14.2[3] 14.3[1] | |
13241 Biyo, provisional designation1998 KM41, is a backgroundasteroid from theFlora region of the innerasteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 22 May 1998, by theLincoln Near-Earth Asteroid Research team (LINEAR) at the U.S.Lincoln Laboratory Experimental Test Site in Socorro, New Mexico. The presumedS-type asteroid has arotation period of 4.4 hours and likely an elongated shape.[6] It was later named after Filipino educatorJosette Biyo.[1]
Biyo is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[2][7] Based on osculating Keplerianorbital elements, the asteroid has also been classified as a member of theFlora family (402), a giantasteroid clan and the largest family of stony asteroids in the main-belt.[4]
It orbits the Sun in theinner asteroid belt at a distance of 2.1–2.4 AU once every 3 years and 5 months (1,252 days;semi-major axis of 2.27 AU). Its orbit has aneccentricity of 0.06 and aninclination of 7° with respect to theecliptic.[3] It was first identified as1975 UB1 at theKarl Schwarzschild Observatory in 1975, extending the body'sobservation arc by 23 years prior to its official discovery observation at Socorro.[1]
Thisminor planet was named afterJosette Biyo (born 1958), a Filipino educator, former executive director of the Philippine Science High School System and now the director of Department of Science and Technology- Science Education Institute.[8] The naming was part of theInternational Excellence in Teaching Award she received during theIntel International Science and Engineering Fair held in Louisville, Kentucky, in 2002, when she was a teacher at the Philippine Science High School in Iloilo, Philippines. Biyo was the first Asian teacher to win the Intel Excellence in Teaching Award.[1][9] The officialnaming citation was published by theMinor Planet Center on 24 July 2002 (M.P.C. 46109).[10]
In March 2011, a rotationallightcurve ofBiyo was obtained from photometric observations by Italian astronomers at the Virginio Cesarini Observatory (157) in Frasso Sabino, Italy. Lightcurve analysis gave arotation period of 4.4 hours (twice the original reported period solution of2.199±0.219 in the R-band) with a brightness amplitude of 0.99magnitude, which indicates that the body has an elongated, non-spheroidal shape (U=2). The Italian astronomers also determined aV–R color of 0.38.[6]
For this asteroid, no observational data has been gathered by the space-based telescopes (IRAS,Akari andWISE) that surveyed large portions of the asteroid belt.[3][4] TheCollaborative Asteroid Lightcurve Link assumes an albedo for astony asteroid of 0.24 – derived from8 Flora, the largest member and namesake of the Flora family – and calculates a diameter of 3.92 kilometers with anabsolute magnitude of 14.2.[4]
