C/1998 Y1 (LINEAR)
메타데이터
| 항목 |
값 |
| Designation |
C/1998 Y1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-11-21T13:57:33.661440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
131 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1999-01-13.0000000 |
| e |
0.92389938 |
| q (au) |
1.746990 |
| a (au) |
22.956311 |
| i (deg) |
28.108156 |
| Ω (om, deg) |
98.858723 |
| ω (w, deg) |
339.843627 |
| M (ma, deg) |
0.469715 |
밝기
산란 + 전체 선형
$$
M_a = (13.174 + 5.449\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.174 |
| n |
5.449 |
| gf |
0.913 |
| gb |
-0.901 |
| k |
1.000 |
| δ90 |
6.054 |
| 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 |
16:51:26.20 |
-08:36:43.6 |
HIP 82448 |
7.09 |
| 2026-02-03 12:00 |
16:51:27.99 |
-08:36:37.7 |
HIP 82448 |
7.52 |
| 2026-02-04 00:00 |
16:51:29.75 |
-08:36:31.6 |
HIP 82448 |
7.95 |
| 2026-02-04 12:00 |
16:51:31.49 |
-08:36:25.4 |
HIP 82448 |
8.38 |
| 2026-02-05 00:00 |
16:51:33.21 |
-08:36:19.2 |
HIP 82448 |
8.80 |
| 2026-02-05 12:00 |
16:51:34.90 |
-08:36:12.8 |
HIP 82448 |
9.22 |
| 2026-02-06 00:00 |
16:51:36.57 |
-08:36:06.4 |
HIP 82448 |
9.64 |
| 2026-02-06 12:00 |
16:51:38.21 |
-08:35:59.9 |
HIP 82448 |
10.05 |
| 2026-02-07 00:00 |
16:51:39.83 |
-08:35:53.2 |
HIP 82448 |
10.45 |
| 2026-02-07 12:00 |
16:51:41.42 |
-08:35:46.5 |
HIP 82448 |
10.85 |
| 2026-02-08 00:00 |
16:51:42.99 |
-08:35:39.7 |
HIP 82448 |
11.24 |
| 2026-02-08 12:00 |
16:51:44.53 |
-08:35:32.8 |
HIP 82448 |
11.63 |
| 2026-02-09 00:00 |
16:51:46.05 |
-08:35:25.8 |
HIP 82448 |
12.01 |
| 2026-02-09 12:00 |
16:51:47.54 |
-08:35:18.8 |
HIP 82448 |
12.39 |
| 2026-02-10 00:00 |
16:51:49.01 |
-08:35:11.6 |
HIP 82448 |
12.76 |
| 2026-02-10 12:00 |
16:51:50.45 |
-08:35:04.3 |
HIP 82448 |
13.12 |
| 2026-02-11 00:00 |
16:51:51.87 |
-08:34:57.0 |
HIP 82448 |
13.49 |
| 2026-02-11 12:00 |
16:51:53.26 |
-08:34:49.6 |
HIP 82448 |
13.84 |
| 2026-02-12 00:00 |
16:51:54.62 |
-08:34:42.1 |
HIP 82448 |
14.19 |
| 2026-02-12 12:00 |
16:51:55.96 |
-08:34:34.5 |
HIP 82448 |
14.53 |
| 2026-02-13 00:00 |
16:51:57.28 |
-08:34:26.8 |
HIP 82448 |
14.87 |
| 2026-02-13 12:00 |
16:51:58.56 |
-08:34:19.0 |
HIP 82448 |
15.20 |
| 2026-02-14 00:00 |
16:51:59.82 |
-08:34:11.2 |
HIP 82448 |
15.53 |
| 2026-02-14 12:00 |
16:52:01.06 |
-08:34:03.2 |
HIP 82448 |
15.85 |
| 2026-02-15 00:00 |
16:52:02.26 |
-08:33:55.2 |
HIP 82448 |
16.16 |
| 2026-02-15 12:00 |
16:52:03.45 |
-08:33:47.1 |
HIP 82448 |
16.47 |
| 2026-02-16 00:00 |
16:52:04.60 |
-08:33:38.9 |
HIP 82448 |
16.78 |
| 2026-02-16 12:00 |
16:52:05.73 |
-08:33:30.6 |
HIP 82448 |
17.07 |
| 2026-02-17 00:00 |
16:52:06.83 |
-08:33:22.3 |
HIP 82448 |
17.36 |
| 2026-02-17 12:00 |
16:52:07.90 |
-08:33:13.9 |
HIP 82448 |
17.65 |
| 2026-02-18 00:00 |
16:52:08.95 |
-08:33:05.4 |
HIP 82448 |
17.93 |
| 2026-02-18 12:00 |
16:52:09.97 |
-08:32:56.8 |
HIP 82448 |
18.20 |
| 2026-02-19 00:00 |
16:52:10.96 |
-08:32:48.2 |
HIP 82448 |
18.47 |
| 2026-02-19 12:00 |
16:52:11.92 |
-08:32:39.4 |
HIP 82448 |
18.73 |
| 2026-02-20 00:00 |
16:52:12.86 |
-08:32:30.6 |
HIP 82448 |
18.99 |
| 2026-02-20 12:00 |
16:52:13.77 |
-08:32:21.7 |
HIP 82448 |
19.24 |
| 2026-02-21 00:00 |
16:52:14.65 |
-08:32:12.8 |
HIP 82448 |
19.48 |
| 2026-02-21 12:00 |
16:52:15.51 |
-08:32:03.8 |
HIP 82448 |
19.72 |
| 2026-02-22 00:00 |
16:52:16.34 |
-08:31:54.7 |
HIP 82448 |
19.96 |
| 2026-02-22 12:00 |
16:52:17.14 |
-08:31:45.5 |
HIP 82448 |
20.18 |
| 2026-02-23 00:00 |
16:52:17.91 |
-08:31:36.3 |
HIP 82448 |
20.40 |
| 2026-02-23 12:00 |
16:52:18.65 |
-08:31:27.0 |
HIP 82448 |
20.62 |
| 2026-02-24 00:00 |
16:52:19.37 |
-08:31:17.6 |
HIP 82448 |
20.83 |