3749 Balam

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3749 Balam
Discovery [1]
Discovered by E. Bowell
Discovery site Anderson Mesa Station
Discovery date 24 January 1982
Designations
MPC designation 3749 Balam
Named after
 David Balam
(astronomer)[2]
1982 BG1 · 1954 XM
1962 ED · 1974 YO
main-belt · Flora [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 60.31 yr (22,028 days)
Aphelion 2.4821 AU
Perihelion 1.9920 AU
2.2370 AU
Eccentricity 0.1095
3.35 yr (1222.1 days)
18.230°
Inclination 5.3817°
295.74°
174.01°
Known satellites 2 satellites
5.2±1 km, 1.5 km
Physical characteristics
Dimensions 7.2 km[4]
4.7±0.5 km[5]
6.36 km (calculated)[3]
Mass (5.09±0.2)×1014 kg[4][6]
Mean density
 2.61±0.45 g/cm³[4][6]
2.80483 h[7]
2.80490±0.00008 h[8]
2.80478±0.00005 h[lower-alpha 1]
2.80494±0.00007 h[9]
0.16[10]
0.3546±0.0671[11]
0.277±0.096[5]
0.15 (assumed)[3]
S [3][10]
13.3

3749 Balam, provisionally known as 1982 BG1, is a trinary asteroid orbiting the inner regions of asteroid belt, about 7 kilometers in diameter. It was discovered by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona on 24 January 1982.[12]

The asteroid is a member of the Flora family, a very large group of stony asteroids in the inner main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,222 days). Its orbit shows an eccentricity of 0.11 and is tilted by 5 degrees to the plane of the ecliptic. The S-type asteroid has an albedo of 0.16.[10] The body's rotation around its axis has been measured several times by different light-curve observations with a concurring period of 2.8 hours.[7][8][9][lower-alpha 1]

It is named after the Canadian astronomer David Balam, principal observer at Victoria's Climenhaga Observatory in British Columbia.[2]

Satellite system

On February 13, 2002, the discovery of a satellite with a diameter of approximately 1.5 kilometers, designated S/2002 (3749) 1, was announced by a team of researchers from SwRI, UA, JPL and OSUG, using the Gemini North Telescope on Mauna Kea in Hawaii.[13] It orbits 289±13 km away in 61±10 days, with an orbital eccentricity of ~ 0.9.[6]

Being such as small primary body in the inner main belt with a separation of over 100 primary radii, S/2002 (3749) 1 is the most loosely bound binary known.[14] Balam has a Hill sphere with a radius of about 1,500 kilometers.[6]

In March 2008, Franck Marchis discovered a larger (~3 km) inner companion, making this a triple system.[15][16][17]

References

  1. ↑ 1.0 1.1 Pravec-2012web, rotation period of 2.80478±0.00005 with an amplitude in brightness variation of 0.1 magnitude. Summary figures at Lightcurve Database for (3749) Balam
  1. ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 6.2 6.3 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ 9.0 9.1 Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ 10.0 10.1 10.2 Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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