1350 Rosselia
Asteroid
From Wikipedia, the free encyclopedia
1350 Rosselia, provisional designation 1934 TA, is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 22 kilometers in diameter. Discovered by astronomer Eugène Delporte at the Royal Observatory of Belgium in 1934,[17] the asteroid was later named after Marie-Thérèse Rossel, editor of the Belgian newspaper Le Soir.[2]
_Rosselia.png)
Shape model of Rosselia from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 3 October 1934 |
| Designations | |
| (1350) Rosselia | |
Named after | Marie-Thérèse Rossel[2] (editor of Le Soir) |
| 1934 TA · 1926 AF 1929 TN · 1929 VH 1934 VA · 1938 OC 1948 QG · 1949 YY A924 TB | |
| main-belt · (outer) Koronis[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.09 yr (32,176 days) |
| Aphelion | 3.1133 AU |
| Perihelion | 2.6007 AU |
| 2.8570 AU | |
| Eccentricity | 0.0897 |
| 4.83 yr (1,764 days) | |
| 65.352° | |
| 0° 12m 14.76s / day | |
| Inclination | 2.9392° |
| 139.55° | |
| 237.70° | |
| Physical characteristics | |
| Dimensions | 20.822±0.185 km[5] 21.083±0.147 km[6] 21.22±0.38 km[7] 22.60±3.16 km[8] 23.35±1.7 km[3][9] |
| 6.0 h[10] 8.1394±0.0002 h[11] 8.140±0.001 h[11][12] 8.14±0.05 h[11] 8.14008±0.00001 h[13] 8.14011±0.00005 h[14] 8.16±0.01 h[15] | |
| 0.1579±0.025[3][9] 0.185±0.314[8] 0.1960±0.0511[6] 0.199±0.008[7] 0.199±0.022[5] | |
| Tholen = S[1] SMASS = Sa[1] BâV = 0.854[1] UâB = 0.373[1] | |
| 10.36±0.25 (R)[15] · 10.67±0.06[16] · 10.68[8] · 10.78[1][3][6][7][9] · 10.81±0.01[12] | |
Discovery
Rosselia was discovered on 3 October 1934, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle.[17] One month later, it was independently discovered by German astronomer Richard Schorr at the Bergedorf Observatory, Hamburg, on 3 November 1934.[2] The Minor Planet Center only recognizes the first discoverer. The asteroid was first identified as A924 TB at the Simeiz Observatory in October 1924.[17]
Orbit and classification
Rosselia is a member of the Koronis family (605),[3][4] a very large asteroid family with nearly co-planar ecliptical orbits in the outer main belt.[18] It orbits the Sun at a distance of 2.6â3.1 AU once every 4 years and 10 months (1,764 days; semi-major axis of 2.86 AU). Its orbit has an eccentricity of 0.09 and an inclination of 3° with respect to the ecliptic.[1]
The body's observation arc begins at Lowell Observatory in September 1929, or five years prior to its official discovery observation at Uccle.[17]
Physical characteristics
In the Tholen classification, Rosselia is a common S-type asteroid.[1] In the SMASS classification it is an Sa-subtype that transitions to the rare A-type asteroids.[1]
Rotation period and poles
Several rotational lightcurve of Rosselia have been obtained from photometric observations since 1975.[10][11][12][15] Consolidated lightcurve-analysis gave a well-defined rotation period of 8.140 hours with a brightness amplitude between 0.3 and 0.54 magnitude (U=3).[3]
Modeling of the asteroid's lightcurve gave two concurring periods of 8.14008 and 8.14011 hours,[13][14] with two determined spin axis of (67.0°, â64.0°) and (246.0°, â58.0°) in ecliptic coordinates (λ, β).[13]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Rosselia measures between 20.822 and 23.35 kilometers in diameter and its surface has an albedo between 0.1579 and 0.199.[5][6][7][8][9]
The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1579 and a diameter of 23.35 kilometers based on an absolute magnitude of 10.78.[3][9]
Naming
This minor planet was named after Marie-Thérèse Rossel (1910â1987), a Belgian businesswoman and editor of the Brussels newspaper Le Soir.[2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 122).[2] Asteroid 1366 Piccolo was also named after an editor of Le Soir by Delporte.
