1 Ceres (hû-hō: ) sī 1 lia̍p tiàm tī sió-he̍k-chheⁿ-toà ê é-he̍k-chheⁿ, hoat-hiān-jîn sī Giuseppe Piazzi, tī 1801 nî.
Ceres sī Lô-má cha-bó͘ sîn-bêng ê miâ.
Ceres in true colour in 2015 | |||||||||
Hoat-kiàn | |||||||||
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Hoat-kiàn-chiá | Giuseppe Piazzi | ||||||||
Hoat-kiàn ji̍t-chí | 1 January 1801 | ||||||||
Miâ-hō | |||||||||
MPC miâ-hō | 1 Ceres | ||||||||
Ho͘-im | /ˈsɪəriːz/ | ||||||||
Hō-miâ iû-lâi | Cerēs | ||||||||
Minor planet category | |||||||||
Adjectives | Cererian, -ean (/sɪˈrɪəriən/) | ||||||||
Kúi-tō sèng-chit | |||||||||
Goân-kî 21 January 2022 (JD 2459600.5 ) | |||||||||
Aphelion | 2.98 astronomical units (446×10 6 km) | ||||||||
Kīn-ji̍t-tiám | 2.55 astronomical units (381×10 6 km) | ||||||||
2.77 astronomical units (414×10 6 km) | |||||||||
Lî-sim-lu̍t | 0.0785 | ||||||||
Kúi-tō chiu-kî | 4.60 yr 1680 d | ||||||||
Hōe-ha̍p chiu-kî | 1.28 yr 466.6 d | ||||||||
Pêng-kin kúi-tō sok-le̍k | 17.9 km/s | ||||||||
Pêng-kin kīn-tiám-kak | 291.4° | ||||||||
Khi-pêng | to ecliptic 10.6° 9.20° to invariable plane | ||||||||
Seng-kau-tiám ê keng-tō͘ | 80.3° | ||||||||
Time of periastron | 7 December 2022 | ||||||||
Hn̄g-tiám ê ín-sò͘ | 73.6° | ||||||||
Proper orbital elements | |||||||||
Proper Pòaⁿ-tn̂g chhia-sim | 2.77AU | ||||||||
Proper eccentricity | 0.116 | ||||||||
Proper inclination | 9.65° | ||||||||
Proper mean motion | 78.2 deg / yr | ||||||||
Proper orbital period | 4.60358 yr (1681.458 d) | ||||||||
Precession of perihelion | arcsec / yr 54.1 | ||||||||
Precession of the ascending node | arcsec / yr −59.2 | ||||||||
Physical characteristics | |||||||||
Dimensions | (964.4 × 964.2 × 891.8) ± 0.2 km | ||||||||
Mean diameter | ±0.2 km 939.4 | ||||||||
Pêng-kin poàn-kéng | 469.73 km | ||||||||
Piáu-bīn-chek | 2,770,000 km2[d] | ||||||||
Thé-chek | 434,000,000 km3[d] | ||||||||
Chit-liōng | ±0.0001)×1020 kg (9.3835 16 Earths 0.000 0.0128 Moons | ||||||||
Pêng-kin bi̍t-tō͘ | ±0.008 g/cm3 2.162 | ||||||||
Equatorial surface gravity | Pang-bô͘:Gr m/s2[d] 0.029 g | ||||||||
Koàn-sèng in-chú ê lêng-lu̍t | ±0.15 (estimate) 0.36 | ||||||||
Equatorial escape velocity | Pang-bô͘:V2 km/s[d] | ||||||||
Hêng-chheⁿ chū-choán chiu-kî | 170±0.000001 h 9.074 | ||||||||
Chhiah-tō chū-choán sok-tō͘ | 92.61 m/s[d] | ||||||||
Chhia-sim khi-pêng | ≈4° | ||||||||
Pak-ke̍k chhiah-keng | 291.42744° | ||||||||
Pak-ke̍k chhiah-hūi | 66.76033° | ||||||||
Geometric albedo | ±0.0033 (V-band) 0.090 | ||||||||
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Spectral type | C | ||||||||
Bêng-hián-tō͘ |
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3.34 | |||||||||
Kak-ti̍t-kèng | 0.854″ to 0.339″ | ||||||||
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19 sè-kí chhím hoat-hiān ê sî, lâng lia̍h-chún i hām kî-thaⁿ ê he̍k-chheⁿ sio siâng, só͘-í kā i tòng-chò 1 lia̍p he̍k-chheⁿ. Boé--á khah liáu-kái i ê sèng-chit liáu-aū, tō kā lia̍t chò sió-he̍k-chheⁿ. Sui-bóng 1 Ceres ti̍t-kèng chiah 950 km, i si̍t-chāi sī Thài-iông-hē 13 bān lia̍p sió-he̍k-chheⁿ tang-tiong, siōng kài toā lia̍p, chit-liōng siōng chē, hêng siōng îⁿ ê 1 lia̍p, ē-sái kóng sió-he̍k-chheⁿ-toà ū 3-hūn-1 ê chit-liōng tī i hia. In-ūi án-ne, 2006 nî 8 goe̍h thian-bûn-ha̍k-kài koh kā i kái lia̍t chò 1 lia̍p "é-he̍k-chheⁿ".
Thài-iông-hē |
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Chheⁿ: Ji̍t-thâu |
He̍k-chheⁿ: Chúi-chheⁿ | Kim-chheⁿ | Tē-kiû | Hóe-chheⁿ | Bo̍k-chheⁿ | Thó͘-chheⁿ | Thian-ông-chheⁿ | Hái-ông-chheⁿ |
É-he̍k-chheⁿ: Ceres | Mê-ông-chheⁿ | Haumea | Makemake | Eris |
Sió-bu̍t-thé: Sió-he̍k-chheⁿ | Hái-ông-chheⁿ goā chheⁿ-thé | Tn̂g-boé-chheⁿ |
Oē-chheⁿ: Goe̍h-niû | Hoé-chheⁿ ê | Bo̍k-chheⁿ ê | Thó͘-chheⁿ ê | Thian-ông-chheⁿ ê | Hái-ông-chheⁿ ê |
Tīn: Sió-he̍k-chheⁿ-toà | Kuiper-toà | Sàn-loān îⁿ-poâⁿ | Oort-hûn |
Chhiáⁿ chham-khó thian-bûn bu̍t-thé, thài-iông-hē ê chheⁿ-thé lia̍t-toaⁿ, chiàu poàⁿ-kèng pâi iah sī chiàu chit-liōng pâi |
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