.png) Lightcurve-based 3D-model ofJose | |
| Discovery[1] | |
|---|---|
| Discovered by | J. Hunaerts |
| Discovery site | Uccle Obs. |
| Discovery date | 28 August 1936 |
| Designations | |
| (1423) Jose | |
Named after | Giuseppina, daughter ofGiuseppe Bianchi[2] (Italian astronomer) |
| 1936 QM · 1931 TM2 1934 EE · 1936 SC 1937 YE · 1946 UF 1950 PW · 1968 HL | |
| main-belt[1][3] · (outer) Koronis[4][5][6] | |
| Orbital characteristics[3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.39yr (41,051 d) |
| Aphelion | 3.0890AU |
| Perihelion | 2.6318 AU |
| 2.8604 AU | |
| Eccentricity | 0.0799 |
| 4.84 yr (1,767 d) | |
| 13.592° | |
| 0° 12m 13.32s / day | |
| Inclination | 2.9071° |
| 58.469° | |
| 321.66° | |
| Physical characteristics | |
| 15.81±1.02 km[7] 19.580±0.243 km[8][9] 20.046±0.117 km[10] 26.14±2.5 km[11] | |
| 12.307±0.002 h[12] | |
| 0.1632[11] 0.2814[10] 0.291[8] 0.338[7] | |
| SMASS =S[3][5] S(SDSS-MOC)[13] | |
| 10.50[8][10][11] 10.80[7] 10.9[1][3][5] | |
1423 Jose, provisional designation1936 QM, is a stonyasteroid of theKoronis family from the outer regions of theasteroid belt, approximately 20 kilometers (12 miles) in diameter. It was discovered on 28 August 1936, by Belgian astronomerJoseph Hunaerts at theRoyal Observatory of Belgium in Uccle.[1] The elongatedS-type asteroid has arotation period of 12.3 hours.[5] It was named for Giuseppina, daughter of Italian astronomerGiuseppe Bianchi.[2]
Jose is a core member of theKoronis family (605),[4][6] a prominentasteroid family with nearly co-planar ecliptical orbits.[5][14] It orbits the Sun in theouter asteroid belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,767 days;semi-major axis of 2.86 AU). Its orbit has aneccentricity of 0.08 and aninclination of 3° with respect to theecliptic.[3] The asteroid was first imaged on aprecovery taken at theLowell Observatory in June 1906. The body'sobservation arc begins with its official discovery observation at Uccle in August 1936.[1]
Thisminor planet was named by Cesare Lombardi after Giuseppina Bianchi, a daughter ofGiuseppe Bianchi who died young. The officialnaming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 128).[2] Lombardi published several studies on the orbit of this asteroid.[15][16][17][18]
In theSDSS-based taxonomy, as well as in theSMASS classification,Jose is a common, stonyS-type asteroid,[3][13] which is also the overallspectral type for the members of theKoronis family.[14]: 23
In November 2004, a rotationallightcurve ofJose was obtained fromphotometric observations by amateur astronomers Rui Goncalves (938) andLaurent Bernasconi (A14) in Portugal and France, respectively. Lightcurve analysis gave a well-definedrotation period of12.307±0.002 hours and a brightness variation of 0.68magnitude (U=3), indicative of a non-spherical, elongated shape.[12]
During an extensive lightcurve survey of Koronian asteroids by visiting American astronomers using the 0.6-m telescope atMauna Kea Observatory of theInstitute for Astronomy in Hawaii during 1997–2005, another period of12.313±0.003 with an amplitude of 0.80 magnitude was determined (U=3).[19] French amateur astronomerRené Roy and the team at thePalomar Transient Factory in California also measured as period of12.28±0.01 and12.294±0.0146 with an amplitude of 0.82 and 0.96, respectively (U=2/2).[12][20] A modeled lightcurve derived from combined dense and sparse photometric data was published in 2013. It gave a concurring period of12.3127±0.0005 hours and aspin axis at (78.0°, −82.0°) inecliptic coordinates (λ, β).[21]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Jose measures between 15.8 and 26.1 kilometers in diameter and its surface has analbedo between 0.16 and 0.34.[7][8][9][10][11] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1151 and a diameter of 25.88 kilometers based on anabsolute magnitude of 10.9.[5]
