431 Nephele

Main-belt asteroid

431 NepheleDiscovery

Discovered by| Auguste Charlois
Discovery date| 18 December 1897
Designations

MPC designation

| (431) Nephele
Pronunciation| /ˈnɛfəliː/[1]

Named after

| Nephele

Alternative designations

| 1897 DN

Minor planet category

| Main belt (Themis)
Adjectives| Nephelean /nɛfɪˈliːən/
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc| 113.52 yr (41462 d)
Aphelion| 3.67837 AU (550.276 Gm)
Perihelion| 2.61178 AU (390.717 Gm)

Semi-major axis

| 3.14507 AU (470.496 Gm)
Eccentricity| 0.16957

Orbital period (sidereal)

| 5.58 yr (2037.3 d)

Mean anomaly

| 230.611°

Mean motion

| 0° 10m 36.152s / day
Inclination| 1.82752°

Longitude of ascending node

| 117.229°

Argument of perihelion

| 216.161°
Physical characteristics

Mean diameter

| 95.03±1.6 km

Synodic rotation period

| 18.821 h (0.7842 d)

Geometric albedo

| 0.0636±0.002

Spectral type

| C

Absolute magnitude (H)

| 8.72

Nephele (minor planet designation: 431 Nephele) is a large Themistian asteroid. It is spectral C-type and is probably composed of carbonaceous material.

It was discovered by Auguste Charlois on 18 December 1897 in Nice.

## References[edit]

1. ^ Noah Webster (1884) A Practical Dictionary of the English Language
2. ^ "431 Nephele (1897 DN)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 16 September 2020. Retrieved 10 May 2016.

## External links[edit]

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

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