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 |
1.000 |
| 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) |
| 2026-09-20 00:00 |
18:04:04.86 |
+74:59:08.3 |
HIP 89228 |
34.50 |
| 2026-09-20 12:00 |
18:04:04.59 |
+74:58:50.4 |
HIP 89228 |
34.62 |
| 2026-09-21 00:00 |
18:04:04.36 |
+74:58:32.5 |
HIP 89228 |
34.74 |
| 2026-09-21 12:00 |
18:04:04.17 |
+74:58:14.5 |
HIP 89228 |
34.87 |
| 2026-09-22 00:00 |
18:04:04.02 |
+74:57:56.6 |
HIP 89228 |
34.99 |
| 2026-09-22 12:00 |
18:04:03.91 |
+74:57:38.6 |
HIP 89228 |
35.11 |
| 2026-09-23 00:00 |
18:04:03.83 |
+74:57:20.7 |
HIP 89228 |
35.23 |
| 2026-09-23 12:00 |
18:04:03.80 |
+74:57:02.7 |
HIP 89228 |
35.35 |
| 2026-09-24 00:00 |
18:04:03.80 |
+74:56:44.8 |
HIP 89228 |
35.47 |
| 2026-09-24 12:00 |
18:04:03.85 |
+74:56:26.8 |
HIP 89228 |
35.59 |
| 2026-09-25 00:00 |
18:04:03.93 |
+74:56:08.9 |
HIP 89228 |
35.71 |
| 2026-09-25 12:00 |
18:04:04.05 |
+74:55:50.9 |
HIP 89228 |
35.83 |
| 2026-09-26 00:00 |
18:04:04.21 |
+74:55:33.0 |
HIP 89228 |
35.95 |
| 2026-09-26 12:00 |
18:04:04.42 |
+74:55:15.0 |
HIP 89228 |
36.07 |
| 2026-09-27 00:00 |
18:04:04.65 |
+74:54:57.1 |
HIP 89228 |
36.19 |
| 2026-09-27 12:00 |
18:04:04.93 |
+74:54:39.2 |
HIP 89228 |
36.31 |
| 2026-09-28 00:00 |
18:04:05.25 |
+74:54:21.3 |
HIP 89228 |
36.43 |
| 2026-09-28 12:00 |
18:04:05.61 |
+74:54:03.3 |
HIP 89228 |
36.54 |
| 2026-09-29 00:00 |
18:04:06.00 |
+74:53:45.4 |
HIP 89228 |
36.66 |
| 2026-09-29 12:00 |
18:04:06.43 |
+74:53:27.5 |
HIP 89228 |
36.78 |
| 2026-09-30 00:00 |
18:04:06.91 |
+74:53:09.7 |
HIP 89228 |
36.90 |
| 2026-09-30 12:00 |
18:04:07.42 |
+74:52:51.8 |
HIP 89228 |
37.02 |
| 2026-10-01 00:00 |
18:04:07.97 |
+74:52:33.9 |
HIP 89228 |
37.13 |
| 2026-10-01 12:00 |
18:04:08.55 |
+74:52:16.1 |
HIP 89228 |
37.25 |
| 2026-10-02 00:00 |
18:04:09.18 |
+74:51:58.3 |
HIP 89228 |
37.37 |
| 2026-10-02 12:00 |
18:04:09.85 |
+74:51:40.5 |
HIP 89228 |
37.48 |
| 2026-10-03 00:00 |
18:04:10.55 |
+74:51:22.7 |
HIP 89228 |
37.60 |
| 2026-10-03 12:00 |
18:04:11.29 |
+74:51:04.9 |
HIP 89228 |
37.71 |
| 2026-10-04 00:00 |
18:04:12.07 |
+74:50:47.2 |
HIP 89228 |
37.83 |
| 2026-10-04 12:00 |
18:04:12.89 |
+74:50:29.5 |
HIP 89228 |
37.94 |
| 2026-10-05 00:00 |
18:04:13.75 |
+74:50:11.8 |
HIP 89228 |
38.06 |
| 2026-10-05 12:00 |
18:04:14.64 |
+74:49:54.2 |
HIP 89228 |
38.17 |
| 2026-10-06 00:00 |
18:04:15.58 |
+74:49:36.5 |
HIP 89228 |
38.29 |
| 2026-10-06 12:00 |
18:04:16.55 |
+74:49:18.9 |
HIP 89228 |
38.40 |
| 2026-10-07 00:00 |
18:04:17.56 |
+74:49:01.3 |
HIP 89228 |
38.51 |
| 2026-10-07 12:00 |
18:04:18.60 |
+74:48:43.8 |
HIP 89140 |
38.29 |
| 2026-10-08 00:00 |
18:04:19.69 |
+74:48:26.3 |
HIP 89140 |
38.05 |
| 2026-10-08 12:00 |
18:04:20.81 |
+74:48:08.8 |
HIP 89140 |
37.80 |
| 2026-10-09 00:00 |
18:04:21.97 |
+74:47:51.4 |
HIP 89140 |
37.56 |
| 2026-10-09 12:00 |
18:04:23.17 |
+74:47:34.0 |
HIP 89140 |
37.31 |
| 2026-10-10 00:00 |
18:04:24.41 |
+74:47:16.6 |
HIP 89140 |
37.07 |
| 2026-10-10 12:00 |
18:04:25.68 |
+74:46:59.3 |
HIP 89140 |
36.82 |
| 2026-10-11 00:00 |
18:04:26.99 |
+74:46:42.0 |
HIP 89140 |
36.57 |