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) |
| 2026-05-12 00:00 |
18:19:23.18 |
+75:22:29.1 |
HIP 89958 |
12.60 |
| 2026-05-12 12:00 |
18:19:19.76 |
+75:22:41.1 |
HIP 89958 |
12.55 |
| 2026-05-13 00:00 |
18:19:16.32 |
+75:22:53.0 |
HIP 89958 |
12.52 |
| 2026-05-13 12:00 |
18:19:12.84 |
+75:23:04.8 |
HIP 89958 |
12.49 |
| 2026-05-14 00:00 |
18:19:09.34 |
+75:23:16.5 |
HIP 89958 |
12.48 |
| 2026-05-14 12:00 |
18:19:05.81 |
+75:23:28.1 |
HIP 89958 |
12.47 |
| 2026-05-15 00:00 |
18:19:02.25 |
+75:23:39.5 |
HIP 89958 |
12.48 |
| 2026-05-15 12:00 |
18:18:58.66 |
+75:23:50.8 |
HIP 89958 |
12.49 |
| 2026-05-16 00:00 |
18:18:55.05 |
+75:24:02.0 |
HIP 89958 |
12.51 |
| 2026-05-16 12:00 |
18:18:51.41 |
+75:24:13.1 |
HIP 89958 |
12.54 |
| 2026-05-17 00:00 |
18:18:47.74 |
+75:24:24.1 |
HIP 89958 |
12.58 |
| 2026-05-17 12:00 |
18:18:44.04 |
+75:24:34.9 |
HIP 89958 |
12.64 |
| 2026-05-18 00:00 |
18:18:40.32 |
+75:24:45.7 |
HIP 89958 |
12.69 |
| 2026-05-18 12:00 |
18:18:36.58 |
+75:24:56.3 |
HIP 89958 |
12.76 |
| 2026-05-19 00:00 |
18:18:32.81 |
+75:25:06.7 |
HIP 89958 |
12.84 |
| 2026-05-19 12:00 |
18:18:29.01 |
+75:25:17.1 |
HIP 89958 |
12.93 |
| 2026-05-20 00:00 |
18:18:25.19 |
+75:25:27.3 |
HIP 89958 |
13.02 |
| 2026-05-20 12:00 |
18:18:21.34 |
+75:25:37.4 |
HIP 89958 |
13.12 |
| 2026-05-21 00:00 |
18:18:17.47 |
+75:25:47.4 |
HIP 89958 |
13.23 |
| 2026-05-21 12:00 |
18:18:13.58 |
+75:25:57.3 |
HIP 89958 |
13.35 |
| 2026-05-22 00:00 |
18:18:09.66 |
+75:26:07.0 |
HIP 89958 |
13.48 |
| 2026-05-22 12:00 |
18:18:05.72 |
+75:26:16.6 |
HIP 89958 |
13.61 |
| 2026-05-23 00:00 |
18:18:01.75 |
+75:26:26.0 |
HIP 89958 |
13.75 |
| 2026-05-23 12:00 |
18:17:57.77 |
+75:26:35.4 |
HIP 89958 |
13.90 |
| 2026-05-24 00:00 |
18:17:53.76 |
+75:26:44.6 |
HIP 89958 |
14.06 |
| 2026-05-24 12:00 |
18:17:49.73 |
+75:26:53.6 |
HIP 89958 |
14.22 |
| 2026-05-25 00:00 |
18:17:45.67 |
+75:27:02.6 |
HIP 89958 |
14.39 |
| 2026-05-25 12:00 |
18:17:41.60 |
+75:27:11.4 |
HIP 89958 |
14.56 |
| 2026-05-26 00:00 |
18:17:37.51 |
+75:27:20.0 |
HIP 89958 |
14.74 |
| 2026-05-26 12:00 |
18:17:33.39 |
+75:27:28.6 |
HIP 89958 |
14.92 |
| 2026-05-27 00:00 |
18:17:29.25 |
+75:27:37.0 |
HIP 89958 |
15.11 |
| 2026-05-27 12:00 |
18:17:25.10 |
+75:27:45.3 |
HIP 89958 |
15.31 |
| 2026-05-28 00:00 |
18:17:20.92 |
+75:27:53.4 |
HIP 89958 |
15.51 |
| 2026-05-28 12:00 |
18:17:16.73 |
+75:28:01.4 |
HIP 89958 |
15.72 |
| 2026-05-29 00:00 |
18:17:12.51 |
+75:28:09.3 |
HIP 89958 |
15.93 |
| 2026-05-29 12:00 |
18:17:08.28 |
+75:28:17.0 |
HIP 89958 |
16.14 |
| 2026-05-30 00:00 |
18:17:04.03 |
+75:28:24.6 |
HIP 89958 |
16.36 |
| 2026-05-30 12:00 |
18:16:59.76 |
+75:28:32.0 |
HIP 89958 |
16.58 |
| 2026-05-31 00:00 |
18:16:55.47 |
+75:28:39.3 |
HIP 89958 |
16.81 |
| 2026-05-31 12:00 |
18:16:51.16 |
+75:28:46.5 |
HIP 89958 |
17.04 |
| 2026-06-01 00:00 |
18:16:46.84 |
+75:28:53.5 |
HIP 89958 |
17.27 |
| 2026-06-01 12:00 |
18:16:42.50 |
+75:29:00.4 |
HIP 89958 |
17.51 |
| 2026-06-02 00:00 |
18:16:38.14 |
+75:29:07.2 |
HIP 89958 |
17.75 |