astro.wikisort.org - Asteroid

3688 Navajo, provisional designation 1981 FD, is a Griqua asteroid and a 2:1 Jupiter librator on an eccentric, cometary-like orbit from the outermost regions of the asteroid belt, approximately 6 kilometers (4 miles) in diameter. It was discovered on 30 March 1981, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona.[1] The dark P-type asteroid was named for the Native American Navajo people.

3688 Navajo

Discovery [1]
Discovered by	E. Bowell
Discovery site	Anderson Mesa Stn.
Discovery date	30 March 1981
Designations
MPC designation	(3688) Navajo
Named after	Navajo people [1] (Native American)
Alternative designations	1981 FD
Minor planet category	main-belt [1] · (outer) [2] Griqua [3] · background [4] ACO [5]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	36.40 yr (13,294 d)
Aphelion	4.7627 AU
Perihelion	1.6806 AU
Semi-major axis	3.2216 AU
Eccentricity	0.4783
Orbital period (sidereal)	5.78 yr (2,112 d)
Mean anomaly	148.89°
Mean motion	0° 10m 13.44s / day
Inclination	2.5593°
Longitude of ascending node	19.974°
Argument of perihelion	137.91°
Earth MOID	0.6910 AU (269 LD)
Jupiter MOID	0.2392 AU
TJupiter	2.9960
Physical characteristics
Mean diameter	6.086±0.051 km[6]
Geometric albedo	0.047±0.012[6]
Spectral type	P [5]
Absolute magnitude (H)	15.1[2]

Orbit and classification

Navajo is an asteroid in a cometary orbit (ACO), with no observable coma but with a Tisserand's parameter just below the defined the threshold of 3.0. ACO's may be extinct comets.[5] It is a member of the small dynamical Griqua group, a marginally unstable group of asteroids observed in the Hecuba gap, a 2:1 resonant zone with the gas giant Jupiter.[3] The group is named after its largest member, 1362 Griqua.

Navajo is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outermost asteroid belt at a distance of 1.7–4.8 AU once every 5 years and 9 months (2,112 days; semi-major axis of 3.22 AU). Its orbit has a high eccentricity of 0.48 and an inclination of 3° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at Siding Spring Observatory, just weeks before its official discovery observation at Anderson Mesa.[1]

Physical characteristics

Navajo has been characterized as a dark and primitive P-type asteroid.[5] It has an absolute magnitude of 15.1.[2] As of 2018, no rotational lightcurve of Navajo has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Navajo measures 6.086 kilometers in diameter and its surface has an albedo of 0.047.[6]

Naming

This minor planet was named after the indigenous North American Navajo people, inhabitants of Arizona, New Mexico and Utah in the Southwestern United States. The official naming citation was published by the Minor Planet Center on 2 April 1988 (M.P.C. 12975).[7]

References

External links

• Asteroids in Cometary Orbits (ACOs), Instituto de Astrofísica de Canarias
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 3688 Navajo at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3688 Navajo at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

---

[de] (3688) Navajo

(3688) Navajo ist ein Asteroid des Hauptgürtels, der am 30. März 1981 von Edward L. G. Bowell im Lowell-Observatorium in Flagstaff, Arizona, entdeckt wurde. Er befindet sich in einer 2:1 Bahnresonanz mit Jupiter und wurde nach dem indianischen Volk der Navajo benannt, die heute in Utah, New Mexico und Arizona leben.[1]

---

- [en] 3688 Navajo

---

---