3428 Roberts
Indiana University (Indiana Asteroid Program) | ||
| Discovery site | Goethe Link Obs. | |
|---|---|---|
| Discovery date | 1 May 1952 | |
| Designations | ||
| (3428) Roberts | ||
Named after | Walter Orr Roberts [1] (American astronomer) | |
| 1952 JH · 1952 KB 1972 YQ1 · 1978 JH2 1980 TD15 · 1982 FR1 | ||
Perihelion | 2.2199 AU | |
| 2.6621 AU | ||
| Eccentricity | 0.1661 | |
| 4.34 yr (1,587 d) | ||
| 102.91° | ||
| 0° 13m 36.84s / day | ||
| Inclination | 8.8754° | |
| 230.80° | ||
| 303.48° | ||
| Physical characteristics | ||
Mean diameter | ||
Synodic rotation period | 3.278±0.001 h[8][3] | |
Pole ecliptic latitude | ||
| C/S (assumed)[3] | ||
| 12.00[2][3][6][7] | ||
3428 Roberts (
rotation period of 3.28 hours.[3] It was named in memory of American astronomer Walter Orr Roberts.[1]
Orbit and classification
Roberts is a non-
semi-major axis of 2.66 AU). Its orbit has an eccentricity of 0.17 and an inclination of 9° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation at Goethe Link in May 1952.[1]
Naming
This
M.P.C. 16885).[10]
Physical characteristics
Roberts
spectral type is unknown. The Collaborative Asteroid Lightcurve Link (CALL) generically assumed it to be either a C-type or S-type asteroid.[3]
Rotation period and poles
In March 2008, a rotational
U=3), indicative of an elongated shape.[8] In 2016, a modeled lightcurves using photometric data from various sources, gave a sidereal period of 3.27835±0.00005 hours and two spin axes of (63.0°, 49.0°) and (231.0°, 49.0°) in ecliptic coordinates (λ, β).[9]
Diameter and albedo
According to the surveys carried out by the Japanese
CALL assumes an albedo of 0.10 – a compromise value between the stony (0.20) and carbonaceous (0.057) asteroids of the inner and outer main belt, respectively – and calculates a diameter of 16.73 kilometers based on an absolute magnitude of 12.0.[3]
References
- ^ a b c d e f g "3428 Roberts (1952 JH)". Minor Planet Center. Retrieved 14 May 2018.
- ^ a b c d "JPL Small-Body Database Browser: 3428 Roberts (1952 JH)" (2017-09-28 last obs.). Jet Propulsion Laboratory. Retrieved 14 May 2018.
- ^ a b c d e f g "LCDB Data for (3428) Roberts". Asteroid Lightcurve Database (LCDB). Retrieved 14 May 2018.
- ^ a b "Asteroid 3428 Roberts – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
- ^ S2CID 118745497.
- ^ )
- ^ )
- ^ ISSN 1052-8091. Archived from the original(PDF) on 17 March 2020. Retrieved 19 March 2020.
- ^ S2CID 119112278.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 14 May 2018.
External links
- (3428) Roberts, 3D Asteroid Catalogue
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 3428 Roberts at AstDyS-2, Asteroids—Dynamic Site
- 3428 Roberts at the JPL Small-Body Database
