(16974) Iphthime Jupiter Trojan
Discovered on 18 November 1998 by LINEAR at Socorro.
Iphthime was Penelope's sister who appears to her in a dream and comforts her as she is grieving.Naming citation (MPC batch dated 2017-12-03), IAU / Minor Planet Center, via NASA/JPL
Where Iphthime is today
Seen from above the solar system on 2026-10-14: Iphthime is 5.52 au from the Sun and 6.45 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 16974 |
| Provisional designation | 1998 WR21 |
| Orbit class | Jupiter Trojan |
| Diameter | 57.3 km (#632 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0650 |
| Rotation period | 78.9 hours |
| Absolute magnitude (H) | 9.94 |
| Orbital period | 11.8 years |
| Semi-major axis | 5.18 au |
| Perihelion – aphelion | 4.82 – 5.53 au |
| Eccentricity | 0.0688 |
| Inclination | 15.0° |
| Closest distance between its orbit and Earth's (MOID) | 3.84 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 18 November 1998
- (15036) Giovannianselmi
- (15985) Bhatnagar
- (22756) Manpreetkaur
- (25298) Fionapaine
- (25300) Andyromine
- (26328) Litomysl
- (27125) Siyilee
- (27126) Bonnielei
- (29654) Michaellaue
- (29660) Jessmacalpine
- (29663) Evanmackay
- (69971) Tanzi