ʻOumuamua
Dinamakan sempena | (Nama bahasa Hawaii)[4] |
---|---|
Dimensi | 180 × 30 × 30 m (est. at albedo 0.10)[8][9] 7002200000000000000♠200 m (est. at albedo 0.06–0.08)[10] |
Perihelion | 6999255340000000000♠0.25534±0.00007 AU |
Sebutan | /oʊˈmuːəˈmuːə/ ( dengar) |
Paksi semimajor | 2999872010000000000♠−1.2799±0.0009 AU[n 1] |
Kategori planet minor | Objek antara najam[4] asteroid hiperbola (JPL)[6] |
Magnitud ketara | 19.7 to >27.5[7][n 2][13] |
Tarikh penemuan | 19 Oktober 2017 |
Nama alternatif | 1I/ʻOumuamua 1I/2017 U1 · A/2017 U1 [5] C/2017 U1 [3] · P10Ee5V |
Albedo geometrik | 0.1 (spectral est.)[8] 0.06–0.08 (spectral est.)[10] |
Magnitud mutlak (H) | 7001220799999999999♠22.08±0.45[6] |
Kecondongan | 122.69° |
Argumen perihelion | 241.70° |
Jenis spektrum | RR (red, featureless)[12] D?[8] P?[10] B–V = 6999700000000000000♠0.7±0.06[8] V-R = 6999450000000000000♠0.45±0.05[8] g-r = 6999470000000000000♠0.47±0.04[10] r-i = 6999360000000000000♠0.36±0.16[10] r-J = 7000120000000000000♠1.20±0.11[10] |
Longitud nod menaik | 24.599° |
Kesipian | 7000119949000000000♠1.19949±0.00019 |
Kelajuan purata orbit | 7004263300000000000♠26.33±0.01 km/s (antara najam)[7] |
Min anomali | 35.060° |
Ditemui oleh | Robert Weryk menggunakan Pan-STARRS 1 |
Afelion | n/a |
Kawasan penemuan | Balai Cerap Haleakala, Hawaii |
Tempoh putaran | 7000810000000000000♠8.10±0.02 j[11] 7000810000000000000♠8.10±0.42 h[10] |