C/1885 X1 (Fabry)
메타데이터
| 항목 |
값 |
| Designation |
C/1885 X1 (Fabry) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1886-04-06T10:56:04.807680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:53Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1886-01-18.0000000 |
| e |
1.00038711 |
| q (au) |
0.642383 |
| a (au) |
-1659.415920 |
| i (deg) |
82.629776 |
| Ω (om, deg) |
37.962462 |
| ω (w, deg) |
126.588976 |
| M (ma, deg) |
-0.001144 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
03:18:12.32 |
-45:27:35.1 |
HIP 15490 |
16.61 |
| 2026-02-03 12:00 |
03:18:12.16 |
-45:27:24.7 |
HIP 15490 |
16.56 |
| 2026-02-04 00:00 |
03:18:12.01 |
-45:27:14.3 |
HIP 15490 |
16.52 |
| 2026-02-04 12:00 |
03:18:11.86 |
-45:27:03.8 |
HIP 15490 |
16.47 |
| 2026-02-05 00:00 |
03:18:11.73 |
-45:26:53.3 |
HIP 15490 |
16.42 |
| 2026-02-05 12:00 |
03:18:11.61 |
-45:26:42.8 |
HIP 15490 |
16.37 |
| 2026-02-06 00:00 |
03:18:11.49 |
-45:26:32.3 |
HIP 15490 |
16.33 |
| 2026-02-06 12:00 |
03:18:11.39 |
-45:26:21.7 |
HIP 15490 |
16.28 |
| 2026-02-07 00:00 |
03:18:11.30 |
-45:26:11.1 |
HIP 15490 |
16.24 |
| 2026-02-07 12:00 |
03:18:11.21 |
-45:26:00.5 |
HIP 15490 |
16.19 |
| 2026-02-08 00:00 |
03:18:11.13 |
-45:25:49.9 |
HIP 15490 |
16.14 |
| 2026-02-08 12:00 |
03:18:11.07 |
-45:25:39.3 |
HIP 15490 |
16.10 |
| 2026-02-09 00:00 |
03:18:11.01 |
-45:25:28.7 |
HIP 15490 |
16.05 |
| 2026-02-09 12:00 |
03:18:10.96 |
-45:25:18.0 |
HIP 15490 |
16.01 |
| 2026-02-10 00:00 |
03:18:10.93 |
-45:25:07.3 |
HIP 15490 |
15.96 |
| 2026-02-10 12:00 |
03:18:10.90 |
-45:24:56.6 |
HIP 15490 |
15.91 |
| 2026-02-11 00:00 |
03:18:10.88 |
-45:24:46.0 |
HIP 15490 |
15.87 |
| 2026-02-11 12:00 |
03:18:10.87 |
-45:24:35.2 |
HIP 15490 |
15.83 |
| 2026-02-12 00:00 |
03:18:10.87 |
-45:24:24.5 |
HIP 15490 |
15.78 |
| 2026-02-12 12:00 |
03:18:10.88 |
-45:24:13.8 |
HIP 15490 |
15.74 |
| 2026-02-13 00:00 |
03:18:10.90 |
-45:24:03.1 |
HIP 15490 |
15.69 |
| 2026-02-13 12:00 |
03:18:10.93 |
-45:23:52.3 |
HIP 15490 |
15.65 |
| 2026-02-14 00:00 |
03:18:10.97 |
-45:23:41.6 |
HIP 15490 |
15.60 |
| 2026-02-14 12:00 |
03:18:11.02 |
-45:23:30.8 |
HIP 15490 |
15.56 |
| 2026-02-15 00:00 |
03:18:11.07 |
-45:23:20.0 |
HIP 15490 |
15.52 |
| 2026-02-15 12:00 |
03:18:11.14 |
-45:23:09.3 |
HIP 15490 |
15.48 |
| 2026-02-16 00:00 |
03:18:11.22 |
-45:22:58.5 |
HIP 15490 |
15.43 |
| 2026-02-16 12:00 |
03:18:11.30 |
-45:22:47.7 |
HIP 15490 |
15.39 |
| 2026-02-17 00:00 |
03:18:11.40 |
-45:22:36.9 |
HIP 15490 |
15.35 |
| 2026-02-17 12:00 |
03:18:11.50 |
-45:22:26.1 |
HIP 15490 |
15.31 |
| 2026-02-18 00:00 |
03:18:11.61 |
-45:22:15.3 |
HIP 15490 |
15.27 |
| 2026-02-18 12:00 |
03:18:11.74 |
-45:22:04.6 |
HIP 15490 |
15.23 |
| 2026-02-19 00:00 |
03:18:11.87 |
-45:21:53.8 |
HIP 15490 |
15.19 |
| 2026-02-19 12:00 |
03:18:12.01 |
-45:21:43.0 |
HIP 15490 |
15.15 |
| 2026-02-20 00:00 |
03:18:12.16 |
-45:21:32.2 |
HIP 15490 |
15.11 |
| 2026-02-20 12:00 |
03:18:12.33 |
-45:21:21.5 |
HIP 15490 |
15.07 |
| 2026-02-21 00:00 |
03:18:12.50 |
-45:21:10.7 |
HIP 15490 |
15.03 |
| 2026-02-21 12:00 |
03:18:12.68 |
-45:21:00.0 |
HIP 15490 |
14.99 |
| 2026-02-22 00:00 |
03:18:12.86 |
-45:20:49.2 |
HIP 15490 |
14.96 |
| 2026-02-22 12:00 |
03:18:13.06 |
-45:20:38.4 |
HIP 15490 |
14.92 |
| 2026-02-23 00:00 |
03:18:13.27 |
-45:20:27.7 |
HIP 15490 |
14.88 |
| 2026-02-23 12:00 |
03:18:13.49 |
-45:20:16.9 |
HIP 15490 |
14.85 |
| 2026-02-24 00:00 |
03:18:13.71 |
-45:20:06.2 |
HIP 15490 |
14.81 |