Discovery [1] | |
---|---|
Discovered by | A. Schwassmann |
Discovery site | Bergedorf Obs. |
Discovery date | 17 March 1931 |
Designations | |
(1192) Prisma | |
Named after | Bergedorf Spectral Catalogue ( astronomical catalog) [2] |
1931 FE | |
main-belt · (
inner) Phocaea [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 85.77 yr (31,328 days) |
Aphelion | 2.9762 AU |
Perihelion | 1.7561 AU |
2.3661 AU | |
Eccentricity | 0.2578 |
3.64 yr (1,329 days) | |
297.62 ° | |
0° 16m 14.88s / day | |
Inclination | 23.902° |
1.3517° | |
131.44° | |
Physical characteristics | |
Dimensions | 7.22 km (calculated)
[3] 7.377±0.193 km [5] 9.27±0.25 km [6] |
6.546±0.0170 h
[7] 6.558 h [8] 6.55836±0.00005 h [9] [10] | |
0.144±0.009
[6] 0.220±0.022 [5] 0.23 (assumed) [3] | |
S [3] | |
12.497±0.008 (R) [7] · 12.87±0.47 [11] · 12.92 [1] [3] [5] [6] | |
1192 Prisma, provisional designation 1931 FE, is an elongated Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Friedrich Schwassmann at the Bergedorf Observatory in Hamburg on 17 March 1931. [12] The asteroid was named after the Bergedorf Spectral Catalogue, an astronomical catalog. [2]
Prisma is a member of the Phocaea family ( 701), a prominent family of S-type asteroids with their largest members being 25 Phocaea and 587 Hypsipyle. There are many Mars-crossers among this family of relatively eccentric inner main-belt asteroids . [13]
The asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,329 days). Its orbit has an eccentricity of 0.26 and an inclination of 24 ° with respect to the ecliptic. [1] The body's observation arc begins at Bergedorf, one week after its official discovery observation. [12]
Photometric observations of Prisma gave a well defined rotational lightcurve with a period between 6.546 and 6.558 hours and a high brightness variation of 0.85–1.16 magnitude, which strongly indicates that the body has an elongated, non-spheroidal shape ( U=3/3). [7] [8]
A modeled lightcurve based on optical data from a large collaboration network also found a spin axis of (133.0°, −78.0°) in ecliptic coordinates (λ, β) ( Q=n.a.). [9] [10]
According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Prisma measures between 7.38 and 9.27 kilometers in diameter and its surface has an albedo between 0.144 and 0.220. [5] [6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.23 and calculates a diameter of 7.22 kilometers based on an absolute magnitude of 12.92. [3]
This minor planet was named "Prisma" ( prism) in honour of the Bergedorf Spectral Catalogue ( German: Bergedorfer Spektralkatalog), as prisms are one method of obtaining spectra. [2] The official naming citation was also published in Paul Herget's The Names of the Minor Planets in 1955 ( H 111). [2]
Discovery [1] | |
---|---|
Discovered by | A. Schwassmann |
Discovery site | Bergedorf Obs. |
Discovery date | 17 March 1931 |
Designations | |
(1192) Prisma | |
Named after | Bergedorf Spectral Catalogue ( astronomical catalog) [2] |
1931 FE | |
main-belt · (
inner) Phocaea [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 85.77 yr (31,328 days) |
Aphelion | 2.9762 AU |
Perihelion | 1.7561 AU |
2.3661 AU | |
Eccentricity | 0.2578 |
3.64 yr (1,329 days) | |
297.62 ° | |
0° 16m 14.88s / day | |
Inclination | 23.902° |
1.3517° | |
131.44° | |
Physical characteristics | |
Dimensions | 7.22 km (calculated)
[3] 7.377±0.193 km [5] 9.27±0.25 km [6] |
6.546±0.0170 h
[7] 6.558 h [8] 6.55836±0.00005 h [9] [10] | |
0.144±0.009
[6] 0.220±0.022 [5] 0.23 (assumed) [3] | |
S [3] | |
12.497±0.008 (R) [7] · 12.87±0.47 [11] · 12.92 [1] [3] [5] [6] | |
1192 Prisma, provisional designation 1931 FE, is an elongated Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Friedrich Schwassmann at the Bergedorf Observatory in Hamburg on 17 March 1931. [12] The asteroid was named after the Bergedorf Spectral Catalogue, an astronomical catalog. [2]
Prisma is a member of the Phocaea family ( 701), a prominent family of S-type asteroids with their largest members being 25 Phocaea and 587 Hypsipyle. There are many Mars-crossers among this family of relatively eccentric inner main-belt asteroids . [13]
The asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,329 days). Its orbit has an eccentricity of 0.26 and an inclination of 24 ° with respect to the ecliptic. [1] The body's observation arc begins at Bergedorf, one week after its official discovery observation. [12]
Photometric observations of Prisma gave a well defined rotational lightcurve with a period between 6.546 and 6.558 hours and a high brightness variation of 0.85–1.16 magnitude, which strongly indicates that the body has an elongated, non-spheroidal shape ( U=3/3). [7] [8]
A modeled lightcurve based on optical data from a large collaboration network also found a spin axis of (133.0°, −78.0°) in ecliptic coordinates (λ, β) ( Q=n.a.). [9] [10]
According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Prisma measures between 7.38 and 9.27 kilometers in diameter and its surface has an albedo between 0.144 and 0.220. [5] [6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.23 and calculates a diameter of 7.22 kilometers based on an absolute magnitude of 12.92. [3]
This minor planet was named "Prisma" ( prism) in honour of the Bergedorf Spectral Catalogue ( German: Bergedorfer Spektralkatalog), as prisms are one method of obtaining spectra. [2] The official naming citation was also published in Paul Herget's The Names of the Minor Planets in 1955 ( H 111). [2]