(27816) Naitohiroyuki Main-belt Asteroid
Discovered on 15 October 1993 by Endate, K., Watanabe, K. at Kitami.
Hiroyuki Naito (b. 1977) is a Japanese astronomer and chief research fellow at the Nayoro Observatory in Nayoro City, Hokkaido. He studies classical novae and related objects. He also discovered SN 2007ig in Cetus.Naming citation (WGSBN Bull. 4, #6, 6), IAU / Minor Planet Center, via NASA/JPL
Where Naitohiroyuki is today
Seen from above the solar system on 2026-10-14: Naitohiroyuki is 2.40 au from the Sun and 2.41 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 27816 |
| Provisional designation | 1993 TH2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.90 km (#13,005 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.222 |
| Absolute magnitude (H) | 14.53 |
| Orbital period | 4.22 years |
| Semi-major axis | 2.61 au |
| Perihelion – aphelion | 2.08 – 3.14 au |
| Eccentricity | 0.203 |
| Inclination | 3.20° |
| Closest distance between its orbit and Earth's (MOID) | 1.08 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Hiroyuki
- (7186) Tomioka
- (9642) Takatahiro
- (11072) Hiraoka
- (11928) Akimotohiro
- (19392) Oyamada
- (30925) Todahiroyuki
- (31402) Negishi
- (46649) Tsudahiroyuki
All asteroids named after someone called Hiroyuki
Also discovered on 15 October 1993
- (6340) Kathmandu
- (6412) Kaifu
- (6413) Iye
- (6981) Chirman
- (7133) Kasahara
- (7254) Kuratani
- (8393) Tetsumasakamoto
- (9632) Sudo
- (10561) Shimizumasahiro
- (11087) Yamasakimakoto
- (12362) Mumuryk
- (13582) Tominari