Alinda asteroid
The Alinda asteroids are a dynamical group of asteroids with a semi-major axis of about 2.5
These objects are held in this region by the 3:1 orbital resonance with Jupiter (2.502
Some Alindas have perihelia very close to Earth's orbit, resulting in a series of close encounters at almost exactly four-year intervals, due to the 1:4 near resonance.
One consequence of this is that if an Alinda asteroid happens to be in an unfavorable position for viewing at the time of its close approach to Earth (for instance, at a small elongation from the Sun), then this situation can persist for decades. Indeed, as of 2010, the Alinda asteroid 1915 Quetzálcoatl had been observed only once since 1985.
Another consequence is that some of these asteroids make repeated relatively close approaches to Earth, making them good subjects for study by Earth-based radar. Examples are 4179 Toutatis and 6489 Golevka, as well as 2019 MO, which impacted Earth in June 2019.
Dynamic age[edit]
The 3:1 resonance with Jupiter causes a repeating growth in the eccentricity of the asteroid's orbit. Dynamically young members have an eccentricity ranging from about 0.30 to 0.34 staying mostly in the asteroid belt ranging 1.7–3.4
List of members[edit]
Designation | a | e | Refs |
---|---|---|---|
887 Alinda | 2.48422 | 0.56356 | JPL · MPC |
1429 Pemba | 2.55185 | 0.33858 | JPL · MPC |
1550 Tito | 2.54673 | 0.30984 | JPL · MPC |
1607 Mavis | 2.54783 | 0.30741 | JPL · MPC |
1915 Quetzálcoatl | 2.54207 | 0.57170 | JPL · MPC |
2608 Seneca | 2.5035 | 0.57620 | JPL · MPC |
3360 Syrinx | 2.46803 | 0.74295 | JPL · MPC |
3628 Božněmcová | 2.53691 | 0.30052 | JPL · MPC |
3806 Tremaine | 2.54058 | 0.31301 | JPL · MPC |
4179 Toutatis | 2.51005 | 0.63423 | JPL · MPC |
5847 Wakiya | 2.54442 | 0.30086 | JPL · MPC |
5864 Montgolfier | 2.55866 | 0.32007 | JPL · MPC |
6318 Cronkite | 2.51002 | 0.46522 | JPL · MPC |
(6322) 1991 CQ | 2.51628 | 0.47349 | JPL · MPC |
6489 Golevka | 2.50768 | 0.60382 | JPL · MPC |
(6491) 1991 OA | 2.50959 | 0.58946 | JPL · MPC |
7092 Cadmus | 2.52493 | 0.70202 | JPL · MPC |
7345 Happer | 2.45047 | 0.32467 | JPL · MPC |
(7568) 1988 VJ2 | 2.52739 | 0.33216 | JPL · MPC |
(7569) 1989 BK | 2.54950 | 0.30348 | JPL · MPC |
7638 Gladman | 2.53634 | 0.31606 | JPL · MPC |
(8201) 1994 AH2 | 2.53362 | 0.70851 | JPL · MPC |
8709 Kadlu | 2.53497 | 0.48432 | JPL · MPC |
(9047) 1991 QF | 2.52479 | 0.31661 | JPL · MPC |
See also[edit]
References[edit]
- ^ Minor planet groups/families Archived 2010-11-28 at the Wayback Machine
- ^ a b John S Lewis (2015-08-03). "The Alinda Family of Asteroids". Retrieved 2019-06-26.
- ^ "JPL Small-Body Database Browser: 8709 Kadlu (1994 JF1)". Jet Propulsion Laboratory. Retrieved 2019-06-26.