Hai-ong-chheⁿ

**Hai-ong-chheⁿ**
Hoat-kian
Hoat-kian-chia	Johann Galle ; Urbain Le Verrier ;
Hoat-kian ji?t-chi	23 September 1846
Mia-h?
H?-mia iu-lai	Latin Nept?nus , via French Neptune
Kui-t? seng-chit
	Goan-ki J2000
Aphelion	30.33 astronomical unit s (4.54 × 10 9 km)
K?n-ji?t-tiam	29.81 astronomical units (4.46 × 10 9 km)
Poaⁿ-tn?g chhia-sim	30.07 astronomical units (4.50 × 10 9 km)
Li-sim-lu?t	0.008 678
Kui-t? chiu-ki	164.8 yr ; 60,182 days ; 89,666 Neptunian solar day s ;
H?e-ha?p chiu-ki	367.49 days
Peng-kin kui-t? sok-le?k	5.43 km/s
Peng-kin k?n-tiam-kak	256.228°
Khi-peng	1.767 975 ° to ecliptic ; 6.43° to Sun 's equator ; 0.72° to invariable plane
Seng-kau-tiam e keng-t??	131.784°
Time of periastron	2042-Sep-04
Hn?g-tiam e in-so?	276.336°
Known satellite s	14
Bu?t-li sen-chit
Peng-kin poan-keng	24,622 ± 19 km
Chhiah-t? poan-keng	24,764 ± 15 km ; 3.883 Earths
Ke?k-t? poan-keng	24,341 ± 30 km ; 3.829 Earths
Piⁿ-peⁿ-lu?t	0.0171 ± 0.0013
Piau-b?n-chek	7.6183 × 10 9 km 2 ; 14.98 Earths
The-chek	6.254 × 10 13 km 3 ; 57.74 Earths
Chit-li?ng	1.024 13 × 10 26 kg ; 17.147 Earths ; 5.15×10 -5 Suns
Peng-kin bi?t-t??	1.638 g/cm 3
Piau-b?n ti?ng-le?k	11.15 m/s 2 ; 1.14 g
Koan-seng in-chu e leng-lu?t	0.23 (estimate)
Thoat-chau so?k-t??	23.5 km/s
Heng-chheⁿ ch?-choan chiu-ki	0.6713 day ; 16 h 6 min 36 s
Chhiah-t? ch?-choan sok-t??	2.68 km/s (9,650 km/h)
Chhia-sim khi-peng	28.32° (to orbit)
Pak-ke?k chhiah-keng	19 h 57 m 20 s ; 299.3°
Pak-ke?k chhiah-h?i	42.950°
Hoan-si?-lu?t	0.290 ( bond ) ; 0.442 ( geom. )
Beng-hian-t??	7.67 to 8.00
Kak-ti?t-keng	2.2?2.4″
T?i-khi-khoan
Scale height	19.7 ± 0.6 km
The-chek cho?-seng	; Khi-the : ; 80% ± 3.2% chui-so? ( H ; 2 ) ; 19% ± 3.2% helium (He) ; 1.5% ± 0.5% methane ( CH ; 4 ) ; ~0.019% ti?ng-chui-so?-hoa chui-so? (HD) ; ~0.00015% ethane ( C ; 2 H ; 6 ) ; Peng : ; a-mo?-ni-a ( NH ; 3 ) ; chui ( H ; 2 O ) ; liu-hoa chui-so? ammonium ( NH ; 4 SH ) ; methane peng (?) ( CH ; 4 ·5.75H 2 O ) ;

Hai-ong-chheⁿ ( 海王星 , Eng-gi : Neptune ) s? l? Ji?t-thau t? 8 hn?g e he?k-chheⁿ , m?-koh sam-si ? chau kah t? 9 hn?g khi, in-?i Me-ong-chheⁿ e kui-t? ? khah te?k-su. I m? si Thai-iong-h? si?ng go?-khau, si?ng se lia?p e khi-the to? he?k-chheⁿ ( gas giant ). Se bong se, Hai-ong-chheⁿ e chit-li?ng khah ch? Thiⁿ-ong-chheⁿ , in-?i t?ng-le?k-tiuⁿ ( gravitational field ) ti-su i e bi?t-t?? ? khah koan.

Hai-ong-chheⁿ e mia-j? s? toe Lo-ma hai-sin lai--e. T?i-piau hu-h? s? hai-sin e bu-khi saⁿ-chhe-kek ( trident ) ? . 1846 ni 9 goe?h 23 hong hoat-hi?n. 1989 ni 8 goe?h 25 , Voyager 2 ui i piⁿ--a poe koe.

Chit lia?p na-sek e he?k-chheⁿ chhan-chhi?ⁿ Tho?-chheⁿ m? ? khoan, khah bo iong-ko? t? s?. Voyager 2 hoat-kak chiah-e khoan e kiat-ko? m? kai oan-cheng. Hai-ong-chheⁿ teng-koan e hong-sok ?-tit kau kah 2,000 km/h. Khong-khi l?i-te ? H₂ , ( hydrogen ), He₂ ( helium ), kap CH₄ ( methane , chiau-khi) h?? i khoaⁿ--khi-lai na-na. 1989 ni Voyager 2 poe koe e si khoaⁿ tio?h i e lam-poaⁿ-kiu ? 1 e To?-o?-tiam ( Great Dark Spot ), b?-su Bo?k-ong-chheⁿ e To?-ang-tiam , m?-koh boe-chhiu soah bo--khi. Hai-ong-chheⁿ ? 13 lia?p o?-chheⁿ , l?i-te 5 lia?p iau ? koa cheng-g?. Si?ng to? lia?p e o?-chheⁿ Triton chin sim-sek, to-thau-hiong e kui-t? , Thai-iong-h? si?ng-kai leng (38K) e chheⁿ-the, N₂ ( nitrogen , chit-so?) kap CH₄ ko?-seng e t?i-khi-chan po?h-po?h-po?h (14 microbar).

Go?-p?? lian-kiat [ siu-kai | kai goan-si-be ]

Thai-iong-h?

Chheⁿ : Ji?t-thau
He?k-chheⁿ : Chui-chheⁿ \| Kim-chheⁿ \| T?-kiu \| Hoe-chheⁿ \| Bo?k-chheⁿ \| Tho?-chheⁿ \| Thian-ong-chheⁿ \| Hai-ong-chheⁿ
E-he?k-chheⁿ : Ceres \| Me-ong-chheⁿ \| Haumea \| Makemake \| Eris
Sio-bu?t-the : Sio-he?k-chheⁿ \| Hai-ong-chheⁿ go? chheⁿ-the \| Tn?g-boe-chheⁿ
O?-chheⁿ : Goe?h-niu \| Hoe-chheⁿ e \| Bo?k-chheⁿ e \| Tho?-chheⁿ e \| Thian-ong-chheⁿ e \| Hai-ong-chheⁿ e
T?n: Sio-he?k-chheⁿ-toa \| Kuiper-toa \| San-lo?n iⁿ-poaⁿ \| Oort-hun
Chhiaⁿ chham-kho thian-bun bu?t-the , thai-iong-h? e chheⁿ-the lia?t-toaⁿ , chiau poaⁿ-keng pai iah s? chiau chit-li?ng pai

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