Global Information1453 Fennia information
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 8 March 1938 |
| Designations | |
MPC designation | (1453) Fennia |
| Pronunciation | /ˈfɛniə/ |
Named after | Finland (Scandinavian country)[2] |
Alternative designations | 1938 ED1 |
Minor planet category | main-belt · (inner) Hungaria[3] · background[4] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 79.50 yr (29,037 days) |
| Aphelion | 1.9502 AU |
| Perihelion | 1.8438 AU |
Semi-major axis | 1.8970 AU |
| Eccentricity | 0.0281 |
Orbital period (sidereal) | 2.61 yr (954 days) |
Mean anomaly | 72.856° |
Mean motion | 0° 22m 37.92s / day |
| Inclination | 23.675° |
Longitude of ascending node | 7.0898° |
Argument of perihelion | 254.79° |
| Known satellites | 1 (D: 1.95 km; P: 23.55 h)[5][6][7] |
| Physical characteristics | |
| Dimensions | 6.36±0.68 km[8] 6.573±0.245 km[9] 6.96±0.39 km (derived)[6] 7.23±0.4 km[10] 7.32 km[3][11] 8.98±0.28 km[12] |
Synodic rotation period | 4.412±0.002 h[7][a] 4.4121±0.0001 h[11][13][b] 4.41224±0.0004 h[14] 4.4124±0.0004 h[15] 4.413±0.002 h[16] 6±1 h[17] 12.23±0.04 h (wrong)[18] |
Geometric albedo | 0.140±0.029[19] 0.186±0.013[12] 0.244±0.031[11] 0.2494±0.032[10] 0.409±0.040[9] 0.50±0.16[8] |
Spectral type | Tholen = S[1][3] · K[20] B–V = 0.928[1] B–V = 0.890±0.030[11] U–B = 0.532[1] V–R = 0.500±0.020[11] V–I = 0.980±0.020[11] |
Absolute magnitude (H) | 12.38±0.05 (R)[14] · 12.50[1][8][9] · 12.69[12] · 12.81±0.06[17] · 12.82±0.24[21] · 12.83[10] · 12.83±0.07[11] · 12.835[3] · 12.835±0.06[22] |
1453 Fennia, provisional designation 1938 ED1, is a stony Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Yrjö Väisälä at the Turku Observatory in 1938,[23] the asteroid was later named after the Nordic country of Finland.[2] The system's minor-planet moon was discovered in 2007. It has a derived diameter of 1.95 kilometers and is orbiting its primary every 23.55 hours.[6][7]
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