Main-belt asteroid

937 BethgeaDiscovery

Discovered by| K. Reinmuth
Discovery site| Heidelberg
Discovery date| 12 September 1920
Designations

MPC designation

| (937) Bethgea
Pronunciation| /ˈbɛθɡiə/

Alternative designations

| 1920 HO; A916 GA; 1946 GC; 1959 EQ
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc| 99.97 yr (36513 days)
Aphelion| 2.7160 AU (406.31 Gm)
Perihelion| 1.7473 AU (261.39 Gm)

Semi-major axis

| 2.2317 AU (333.86 Gm)
Eccentricity| 0.21703

Orbital period (sidereal)

| 3.33 yr (1217.7 d)

Mean anomaly

| 296.008°

Mean motion

| 0° 17m 44.304s / day
Inclination| 3.6963°

Longitude of ascending node

| 243.574°

Argument of perihelion

| 72.509°
Physical characteristics

Synodic rotation period

| 8.356 h,[2] 7.5390 h (0.31413 d)[1]

Absolute magnitude (H)

| 11.83

937 Bethgea is a background asteroid from the inner region of the asteroid belt. It was discovered on 12 September 1920 by German astronomer Karl Wilhelm Reinmuth, from Heidelberg.

Photometric observations of this asteroid made at the Torino Observatory in Italy during 1990–1991 were used to determine a synodic rotation period of 8.356 ± 0.006 hours.[2][3]

## References[edit]

1. ^ a b Yeomans, Donald K., "937 Bethgea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 2 May 2016.
2. ^ a b di Martino, M.; et al. (February 1994), "Lightcurves and rotational periods of nine main belt asteroids", Icarus, vol. 107, no. 2, pp. 269–275, Bibcode:1994Icar..107..269D, doi:10.1006/icar.1994.1022.
3. ^ "Asteroid Lightcurve Parameters". Archived from the original on 14 June 2006. Retrieved 3 November 2008.

## External links[edit]

* 937 Bethgea at AstDyS-2, Asteroids—Dynamic Site
* Ephemeris * Observation prediction * Orbital info * Proper elements * Observational info
* 937 Bethgea at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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