| Discovery[1] | |
|---|---|
| Discovered by | Y. Kushida O. Muramatsu |
| Discovery site | Yatsugatake Obs. |
| Discovery date | 3 November 1994 |
| Designations | |
| (15350) Naganuma | |
Named after | Naganuma[1] (Japanese town) |
| 1994 VB2 · 1998 WQ19 | |
| main-belt[1][2] · (inner) background[3][4] | |
| Orbital characteristics[2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.69yr (8,652 d) |
| Aphelion | 3.0346AU |
| Perihelion | 1.7301 AU |
| 2.3823 AU | |
| Eccentricity | 0.2738 |
| 3.68 yr (1,343 d) | |
| 240.74° | |
| 0° 16m 4.8s / day | |
| Inclination | 4.6159° |
| 197.86° | |
| 204.64° | |
| Physical characteristics | |
| 4.357±0.070 km[5][6][7] | |
| 2.5835±0.0001 h[8][a] | |
| 0.256[5][6][7] | |
| S(assumed)[9] | |
| 13.90[5][7] 14.1[1][2] | |
15350 Naganuma (provisional designation1994 VB2) is a stony backgroundasteroid from the inner regions of theasteroid belt, approximately 4.3 kilometers (2.7 miles) in diameter. It was discovered on 3 November 1994, by Japanese astronomersYoshio Kushida andOsamu Muramatsu at theYatsugatake South Base Observatory. The likelyS-type asteroid has arotation period of 2.5 hours.[9] It was named for the town ofNaganuma in northern Japan.[1]
Naganuma is a non-family asteroid from the main belt'sbackground population.[3][4] It orbits the Sun in theinner asteroid belt at a distance of 1.7–3.0 astronomical units (AU) once every 3 years and 8 months (1,343 days;semi-major axis of 2.38 AU). Its orbit has aneccentricity of 0.27 and aninclination of 5° with respect to theecliptic.[2] The body'sobservation arc begins with its official discovery observation at theYatsugatake South Base Observatory in November 1994.[1]
Thisminor planet was named after the town ofNaganuma, located on the island ofHokkaido in northern Japan, where the "Artists Atelier Village" was promoted for many years with more than 20 workshops.[1] The officialnaming citation was published by theMinor Planet Center on 13 October 2000 (M.P.C. 41387).[10]
Naganuma is an assumedS-type asteroid,[9] which agrees with its determinedgeometric albedo(see below).
In November 2005, a rotationallightcurve of Naganuma was obtained fromphotometric observations byDonald Pray at the Carbuncle Hill Observatory (912) on Rhode Island, United States. Lightcurve analysis gave arotation period of2.5835±0.0001 hours with a brightness amplitude of 0.20magnitude (U=3).[8] Concurring periods of 2.58348, 2.5835 and 2.587 hours were also determined by Vladimir Benishek at Sopot Astronomical Observatory (K90) andPetr Pravec atOndřejov Observatory (U=2/2+/2+).[11][a]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer (WISE), Naganuma measures 4.36 kilometers in diameter and its surface has analbedo if 0.256.[5][6][7] TheCollaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-albedo of 0.20 and calculates diameter of 4.34 kilometers based on anabsolute magnitude of 14.16.[9][12]
