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) |
| 2026-05-12 00:00 |
09:17:08.41 |
+28:43:51.3 |
HIP 45617 |
14.16 |
| 2026-05-12 12:00 |
09:17:08.47 |
+28:43:47.0 |
HIP 45617 |
14.10 |
| 2026-05-13 00:00 |
09:17:08.55 |
+28:43:42.7 |
HIP 45617 |
14.04 |
| 2026-05-13 12:00 |
09:17:08.63 |
+28:43:38.3 |
HIP 45617 |
13.97 |
| 2026-05-14 00:00 |
09:17:08.73 |
+28:43:33.9 |
HIP 45617 |
13.91 |
| 2026-05-14 12:00 |
09:17:08.83 |
+28:43:29.4 |
HIP 45617 |
13.84 |
| 2026-05-15 00:00 |
09:17:08.95 |
+28:43:24.9 |
HIP 45617 |
13.77 |
| 2026-05-15 12:00 |
09:17:09.07 |
+28:43:20.4 |
HIP 45617 |
13.69 |
| 2026-05-16 00:00 |
09:17:09.20 |
+28:43:15.8 |
HIP 45617 |
13.62 |
| 2026-05-16 12:00 |
09:17:09.35 |
+28:43:11.2 |
HIP 45617 |
13.54 |
| 2026-05-17 00:00 |
09:17:09.50 |
+28:43:06.5 |
HIP 45617 |
13.46 |
| 2026-05-17 12:00 |
09:17:09.67 |
+28:43:01.8 |
HIP 45617 |
13.38 |
| 2026-05-18 00:00 |
09:17:09.84 |
+28:42:57.1 |
HIP 45617 |
13.30 |
| 2026-05-18 12:00 |
09:17:10.03 |
+28:42:52.4 |
HIP 45617 |
13.22 |
| 2026-05-19 00:00 |
09:17:10.22 |
+28:42:47.6 |
HIP 45617 |
13.13 |
| 2026-05-19 12:00 |
09:17:10.43 |
+28:42:42.8 |
HIP 45617 |
13.04 |
| 2026-05-20 00:00 |
09:17:10.64 |
+28:42:37.9 |
HIP 45617 |
12.95 |
| 2026-05-20 12:00 |
09:17:10.87 |
+28:42:33.0 |
HIP 45617 |
12.86 |
| 2026-05-21 00:00 |
09:17:11.10 |
+28:42:28.1 |
HIP 45617 |
12.77 |
| 2026-05-21 12:00 |
09:17:11.35 |
+28:42:23.2 |
HIP 45617 |
12.67 |
| 2026-05-22 00:00 |
09:17:11.60 |
+28:42:18.2 |
HIP 45617 |
12.58 |
| 2026-05-22 12:00 |
09:17:11.86 |
+28:42:13.2 |
HIP 45617 |
12.48 |
| 2026-05-23 00:00 |
09:17:12.14 |
+28:42:08.2 |
HIP 45617 |
12.38 |
| 2026-05-23 12:00 |
09:17:12.42 |
+28:42:03.1 |
HIP 45617 |
12.27 |
| 2026-05-24 00:00 |
09:17:12.71 |
+28:41:58.0 |
HIP 45617 |
12.17 |
| 2026-05-24 12:00 |
09:17:13.02 |
+28:41:52.8 |
HIP 45617 |
12.06 |
| 2026-05-25 00:00 |
09:17:13.33 |
+28:41:47.7 |
HIP 45617 |
11.95 |
| 2026-05-25 12:00 |
09:17:13.65 |
+28:41:42.5 |
HIP 45617 |
11.84 |
| 2026-05-26 00:00 |
09:17:13.98 |
+28:41:37.3 |
HIP 45617 |
11.73 |
| 2026-05-26 12:00 |
09:17:14.32 |
+28:41:32.0 |
HIP 45617 |
11.62 |
| 2026-05-27 00:00 |
09:17:14.67 |
+28:41:26.7 |
HIP 45617 |
11.50 |
| 2026-05-27 12:00 |
09:17:15.03 |
+28:41:21.4 |
HIP 45617 |
11.38 |
| 2026-05-28 00:00 |
09:17:15.40 |
+28:41:16.1 |
HIP 45617 |
11.26 |
| 2026-05-28 12:00 |
09:17:15.78 |
+28:41:10.8 |
HIP 45617 |
11.14 |
| 2026-05-29 00:00 |
09:17:16.16 |
+28:41:05.4 |
HIP 45617 |
11.02 |
| 2026-05-29 12:00 |
09:17:16.56 |
+28:41:00.0 |
HIP 45617 |
10.89 |
| 2026-05-30 00:00 |
09:17:16.97 |
+28:40:54.5 |
HIP 45617 |
10.77 |
| 2026-05-30 12:00 |
09:17:17.38 |
+28:40:49.1 |
HIP 45617 |
10.64 |
| 2026-05-31 00:00 |
09:17:17.81 |
+28:40:43.6 |
HIP 45617 |
10.51 |
| 2026-05-31 12:00 |
09:17:18.24 |
+28:40:38.1 |
HIP 45617 |
10.37 |
| 2026-06-01 00:00 |
09:17:18.68 |
+28:40:32.5 |
HIP 45617 |
10.24 |
| 2026-06-01 12:00 |
09:17:19.13 |
+28:40:27.0 |
HIP 45617 |
10.11 |
| 2026-06-02 00:00 |
09:17:19.59 |
+28:40:21.4 |
HIP 45617 |
9.97 |