C/1948 W1 (Bester)
메타데이터
| 항목 |
값 |
| Designation |
C/1948 W1 (Bester) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-10-22T20:47:02.400000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
24 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1948-10-16.0000000 |
| e |
0.99749900 |
| q (au) |
1.273428 |
| a (au) |
509.167533 |
| i (deg) |
87.605400 |
| Ω (om, deg) |
67.668500 |
| ω (w, deg) |
274.209200 |
| M (ma, deg) |
-0.000589 |
밝기
산란 + 전체 선형
$$
M_a = (5.916 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.916 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.995 |
| δ90 |
10.000 |
| 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 |
18:18:53.85 |
+74:31:43.2 |
HIP 89188 |
29.75 |
| 2026-02-03 12:00 |
18:18:57.35 |
+74:31:54.4 |
HIP 89188 |
30.03 |
| 2026-02-04 00:00 |
18:19:00.83 |
+74:32:05.7 |
HIP 89188 |
30.32 |
| 2026-02-04 12:00 |
18:19:04.29 |
+74:32:17.1 |
HIP 89188 |
30.60 |
| 2026-02-05 00:00 |
18:19:07.72 |
+74:32:28.6 |
HIP 89188 |
30.89 |
| 2026-02-05 12:00 |
18:19:11.12 |
+74:32:40.2 |
HIP 89971 |
31.15 |
| 2026-02-06 00:00 |
18:19:14.50 |
+74:32:51.9 |
HIP 89971 |
31.27 |
| 2026-02-06 12:00 |
18:19:17.86 |
+74:33:03.8 |
HIP 89971 |
31.40 |
| 2026-02-07 00:00 |
18:19:21.19 |
+74:33:15.8 |
HIP 89971 |
31.53 |
| 2026-02-07 12:00 |
18:19:24.49 |
+74:33:27.8 |
HIP 89971 |
31.66 |
| 2026-02-08 00:00 |
18:19:27.77 |
+74:33:40.0 |
HIP 89971 |
31.80 |
| 2026-02-08 12:00 |
18:19:31.02 |
+74:33:52.3 |
HIP 89971 |
31.95 |
| 2026-02-09 00:00 |
18:19:34.25 |
+74:34:04.7 |
HIP 89971 |
32.10 |
| 2026-02-09 12:00 |
18:19:37.44 |
+74:34:17.2 |
HIP 89971 |
32.25 |
| 2026-02-10 00:00 |
18:19:40.61 |
+74:34:29.9 |
HIP 89971 |
32.41 |
| 2026-02-10 12:00 |
18:19:43.75 |
+74:34:42.6 |
HIP 89971 |
32.57 |
| 2026-02-11 00:00 |
18:19:46.87 |
+74:34:55.4 |
HIP 89971 |
32.73 |
| 2026-02-11 12:00 |
18:19:49.96 |
+74:35:08.4 |
HIP 89971 |
32.90 |
| 2026-02-12 00:00 |
18:19:53.01 |
+74:35:21.4 |
HIP 89971 |
33.08 |
| 2026-02-12 12:00 |
18:19:56.04 |
+74:35:34.6 |
HIP 89971 |
33.25 |
| 2026-02-13 00:00 |
18:19:59.04 |
+74:35:47.8 |
HIP 89971 |
33.43 |
| 2026-02-13 12:00 |
18:20:02.02 |
+74:36:01.1 |
HIP 89971 |
33.62 |
| 2026-02-14 00:00 |
18:20:04.96 |
+74:36:14.6 |
HIP 89971 |
33.81 |
| 2026-02-14 12:00 |
18:20:07.87 |
+74:36:28.1 |
HIP 89971 |
34.00 |
| 2026-02-15 00:00 |
18:20:10.75 |
+74:36:41.8 |
HIP 89971 |
34.19 |
| 2026-02-15 12:00 |
18:20:13.61 |
+74:36:55.5 |
HIP 89971 |
34.39 |
| 2026-02-16 00:00 |
18:20:16.43 |
+74:37:09.4 |
HIP 89971 |
34.59 |
| 2026-02-16 12:00 |
18:20:19.22 |
+74:37:23.3 |
HIP 89971 |
34.80 |
| 2026-02-17 00:00 |
18:20:21.98 |
+74:37:37.3 |
HIP 89971 |
35.01 |
| 2026-02-17 12:00 |
18:20:24.72 |
+74:37:51.5 |
HIP 89971 |
35.22 |
| 2026-02-18 00:00 |
18:20:27.42 |
+74:38:05.7 |
HIP 89971 |
35.43 |
| 2026-02-18 12:00 |
18:20:30.08 |
+74:38:20.0 |
HIP 89971 |
35.65 |
| 2026-02-19 00:00 |
18:20:32.72 |
+74:38:34.4 |
HIP 89971 |
35.87 |
| 2026-02-19 12:00 |
18:20:35.33 |
+74:38:48.8 |
HIP 89971 |
36.09 |
| 2026-02-20 00:00 |
18:20:37.90 |
+74:39:03.4 |
HIP 89971 |
36.32 |
| 2026-02-20 12:00 |
18:20:40.44 |
+74:39:18.1 |
HIP 89971 |
36.55 |
| 2026-02-21 00:00 |
18:20:42.95 |
+74:39:32.8 |
HIP 89971 |
36.78 |
| 2026-02-21 12:00 |
18:20:45.42 |
+74:39:47.6 |
HIP 89971 |
37.01 |
| 2026-02-22 00:00 |
18:20:47.87 |
+74:40:02.5 |
HIP 89971 |
37.25 |
| 2026-02-22 12:00 |
18:20:50.27 |
+74:40:17.5 |
HIP 89971 |
37.49 |
| 2026-02-23 00:00 |
18:20:52.65 |
+74:40:32.6 |
HIP 89971 |
37.73 |
| 2026-02-23 12:00 |
18:20:54.99 |
+74:40:47.7 |
HIP 89971 |
37.97 |
| 2026-02-24 00:00 |
18:20:57.30 |
+74:41:02.9 |
HIP 89971 |
38.21 |