(154997) Marstream Inner Main-belt Asteroid
Discovered on 2 July 2005 by D. Herald at Kambah.
Margaret Streamer (b. 1947) is an amateur Australian astronomer who was told by her high-school principal “don't be silly, girls don't do astronomy”. Almost 60 years later, after a career in biochemistry and a lifetime interest in amateur astronomy, Margaret returned to university and graduated with a Master of Philosophy (Astronomy and Astrophysics).Naming citation (WGSBN Bull. 3, #14, 10), IAU / Minor Planet Center, via NASA/JPL
Where Marstream is today
Seen from above the solar system on 2026-10-14: Marstream is 1.93 au from the Sun and 2.78 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 154997 |
| Provisional designation | 2005 NF1 |
| Orbit class | Inner Main-belt Asteroid |
| Absolute magnitude (H) | 16.44 |
| Orbital period | 2.80 years |
| Semi-major axis | 1.99 au |
| Perihelion – aphelion | 1.92 – 2.05 au |
| Eccentricity | 0.0326 |
| Inclination | 20.8° |
| Closest distance between its orbit and Earth's (MOID) | 0.953 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Margaret
- (8353) Megryan
- (8632) Egleston
- (10739) Lowman
- (12317) Madicampbell
- (22038) Margarshain
- (22725) Drabble
- (37159) Margaretmead
- (46270) Margaretlandis
- (49777) Cappi
- (50725) Margarethuggins
- (70030) Margaretmiller
- (117385) Maughan
All asteroids named after someone called Margaret