C/1947 O1 (Wirtanen)
메타데이터
| 항목 |
값 |
| Designation |
C/1947 O1 (Wirtanen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1947-07-16T20:09:37.615680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
3 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1948-03-29.0000000 |
| e |
1.01675158 |
| q (au) |
2.807881 |
| a (au) |
-167.618847 |
| i (deg) |
97.324802 |
| Ω (om, deg) |
311.764379 |
| ω (w, deg) |
8.848565 |
| M (ma, deg) |
0.116341 |
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 |
09:19:40.43 |
+28:42:28.2 |
HIP 45709 |
22.75 |
| 2026-02-03 12:00 |
09:19:39.18 |
+28:42:33.1 |
HIP 45709 |
22.58 |
| 2026-02-04 00:00 |
09:19:37.94 |
+28:42:38.0 |
HIP 45709 |
22.42 |
| 2026-02-04 12:00 |
09:19:36.70 |
+28:42:42.9 |
HIP 45709 |
22.25 |
| 2026-02-05 00:00 |
09:19:35.45 |
+28:42:47.8 |
HIP 45709 |
22.10 |
| 2026-02-05 12:00 |
09:19:34.21 |
+28:42:52.6 |
HIP 45709 |
21.94 |
| 2026-02-06 00:00 |
09:19:32.96 |
+28:42:57.4 |
HIP 45709 |
21.79 |
| 2026-02-06 12:00 |
09:19:31.72 |
+28:43:02.2 |
HIP 45709 |
21.64 |
| 2026-02-07 00:00 |
09:19:30.47 |
+28:43:06.9 |
HIP 45709 |
21.50 |
| 2026-02-07 12:00 |
09:19:29.23 |
+28:43:11.6 |
HIP 45709 |
21.35 |
| 2026-02-08 00:00 |
09:19:27.98 |
+28:43:16.2 |
HIP 45709 |
21.21 |
| 2026-02-08 12:00 |
09:19:26.74 |
+28:43:20.8 |
HIP 45709 |
21.08 |
| 2026-02-09 00:00 |
09:19:25.49 |
+28:43:25.4 |
HIP 45709 |
20.95 |
| 2026-02-09 12:00 |
09:19:24.25 |
+28:43:30.0 |
HIP 45709 |
20.82 |
| 2026-02-10 00:00 |
09:19:23.00 |
+28:43:34.5 |
HIP 45709 |
20.70 |
| 2026-02-10 12:00 |
09:19:21.76 |
+28:43:39.0 |
HIP 45709 |
20.57 |
| 2026-02-11 00:00 |
09:19:20.52 |
+28:43:43.4 |
HIP 45709 |
20.46 |
| 2026-02-11 12:00 |
09:19:19.28 |
+28:43:47.8 |
HIP 45709 |
20.34 |
| 2026-02-12 00:00 |
09:19:18.04 |
+28:43:52.2 |
HIP 45709 |
20.24 |
| 2026-02-12 12:00 |
09:19:16.80 |
+28:43:56.5 |
HIP 45709 |
20.13 |
| 2026-02-13 00:00 |
09:19:15.56 |
+28:44:00.8 |
HIP 45709 |
20.03 |
| 2026-02-13 12:00 |
09:19:14.32 |
+28:44:05.0 |
HIP 45709 |
19.93 |
| 2026-02-14 00:00 |
09:19:13.08 |
+28:44:09.2 |
HIP 45709 |
19.84 |
| 2026-02-14 12:00 |
09:19:11.85 |
+28:44:13.4 |
HIP 45709 |
19.75 |
| 2026-02-15 00:00 |
09:19:10.62 |
+28:44:17.5 |
HIP 45709 |
19.67 |
| 2026-02-15 12:00 |
09:19:09.39 |
+28:44:21.6 |
HIP 45709 |
19.59 |
| 2026-02-16 00:00 |
09:19:08.16 |
+28:44:25.6 |
HIP 45709 |
19.51 |
| 2026-02-16 12:00 |
09:19:06.93 |
+28:44:29.6 |
HIP 45617 |
19.40 |
| 2026-02-17 00:00 |
09:19:05.70 |
+28:44:33.6 |
HIP 45617 |
19.22 |
| 2026-02-17 12:00 |
09:19:04.48 |
+28:44:37.5 |
HIP 45617 |
19.03 |
| 2026-02-18 00:00 |
09:19:03.26 |
+28:44:41.4 |
HIP 45617 |
18.85 |
| 2026-02-18 12:00 |
09:19:02.04 |
+28:44:45.2 |
HIP 45617 |
18.67 |
| 2026-02-19 00:00 |
09:19:00.82 |
+28:44:49.0 |
HIP 45617 |
18.50 |
| 2026-02-19 12:00 |
09:18:59.61 |
+28:44:52.7 |
HIP 45617 |
18.32 |
| 2026-02-20 00:00 |
09:18:58.40 |
+28:44:56.4 |
HIP 45617 |
18.15 |
| 2026-02-20 12:00 |
09:18:57.19 |
+28:45:00.1 |
HIP 45617 |
17.98 |
| 2026-02-21 00:00 |
09:18:55.98 |
+28:45:03.7 |
HIP 45617 |
17.81 |
| 2026-02-21 12:00 |
09:18:54.78 |
+28:45:07.3 |
HIP 45617 |
17.65 |
| 2026-02-22 00:00 |
09:18:53.58 |
+28:45:10.8 |
HIP 45617 |
17.49 |
| 2026-02-22 12:00 |
09:18:52.38 |
+28:45:14.3 |
HIP 45617 |
17.33 |
| 2026-02-23 00:00 |
09:18:51.18 |
+28:45:17.7 |
HIP 45617 |
17.17 |
| 2026-02-23 12:00 |
09:18:49.99 |
+28:45:21.1 |
HIP 45617 |
17.02 |
| 2026-02-24 00:00 |
09:18:48.80 |
+28:45:24.4 |
HIP 45617 |
16.87 |