메타데이터
| 항목 |
값 |
| Designation |
C/1948 N1 (Wirtanen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1949-05-01T03:57:14.875200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
20 |
| NEO |
- |
| M1 |
11.300 |
| K1 |
4.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1950-03-16.0000000 |
| e |
0.99945965 |
| q (au) |
2.517468 |
| a (au) |
4658.939225 |
| i (deg) |
130.267603 |
| Ω (om, deg) |
120.604872 |
| ω (w, deg) |
229.968351 |
| M (ma, deg) |
0.000988 |
밝기
산란 + 전체 선형
$$
M_a = (7.043 + 4.134\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.043 |
| n |
4.134 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-03-26 00:00 |
06:44:05.13 |
+46:49:12.8 |
HIP 32361 |
12.60 |
| 2026-03-26 12:00 |
06:44:04.93 |
+46:49:06.0 |
HIP 32361 |
12.66 |
| 2026-03-27 00:00 |
06:44:04.74 |
+46:48:59.2 |
HIP 32361 |
12.72 |
| 2026-03-27 12:00 |
06:44:04.57 |
+46:48:52.3 |
HIP 32361 |
12.77 |
| 2026-03-28 00:00 |
06:44:04.41 |
+46:48:45.5 |
HIP 32361 |
12.83 |
| 2026-03-28 12:00 |
06:44:04.27 |
+46:48:38.6 |
HIP 32361 |
12.88 |
| 2026-03-29 00:00 |
06:44:04.15 |
+46:48:31.8 |
HIP 32361 |
12.93 |
| 2026-03-29 12:00 |
06:44:04.04 |
+46:48:24.9 |
HIP 32361 |
12.98 |
| 2026-03-30 00:00 |
06:44:03.94 |
+46:48:18.0 |
HIP 32361 |
13.02 |
| 2026-03-30 12:00 |
06:44:03.86 |
+46:48:11.1 |
HIP 32361 |
13.07 |
| 2026-03-31 00:00 |
06:44:03.80 |
+46:48:04.2 |
HIP 32361 |
13.11 |
| 2026-03-31 12:00 |
06:44:03.75 |
+46:47:57.3 |
HIP 32361 |
13.16 |
| 2026-04-01 00:00 |
06:44:03.71 |
+46:47:50.4 |
HIP 32361 |
13.20 |
| 2026-04-01 12:00 |
06:44:03.69 |
+46:47:43.4 |
HIP 32361 |
13.24 |
| 2026-04-02 00:00 |
06:44:03.69 |
+46:47:36.5 |
HIP 32361 |
13.27 |
| 2026-04-02 12:00 |
06:44:03.70 |
+46:47:29.6 |
HIP 32361 |
13.31 |
| 2026-04-03 00:00 |
06:44:03.72 |
+46:47:22.6 |
HIP 32361 |
13.35 |
| 2026-04-03 12:00 |
06:44:03.76 |
+46:47:15.6 |
HIP 32361 |
13.38 |
| 2026-04-04 00:00 |
06:44:03.82 |
+46:47:08.7 |
HIP 32361 |
13.41 |
| 2026-04-04 12:00 |
06:44:03.89 |
+46:47:01.7 |
HIP 32361 |
13.44 |
| 2026-04-05 00:00 |
06:44:03.97 |
+46:46:54.7 |
HIP 32361 |
13.47 |
| 2026-04-05 12:00 |
06:44:04.07 |
+46:46:47.7 |
HIP 32361 |
13.50 |
| 2026-04-06 00:00 |
06:44:04.19 |
+46:46:40.7 |
HIP 32361 |
13.53 |
| 2026-04-06 12:00 |
06:44:04.31 |
+46:46:33.7 |
HIP 32361 |
13.55 |
| 2026-04-07 00:00 |
06:44:04.46 |
+46:46:26.8 |
HIP 32361 |
13.57 |
| 2026-04-07 12:00 |
06:44:04.62 |
+46:46:19.8 |
HIP 32361 |
13.60 |
| 2026-04-08 00:00 |
06:44:04.79 |
+46:46:12.8 |
HIP 32361 |
13.62 |
| 2026-04-08 12:00 |
06:44:04.98 |
+46:46:05.8 |
HIP 32361 |
13.64 |
| 2026-04-09 00:00 |
06:44:05.18 |
+46:45:58.8 |
HIP 32361 |
13.66 |
| 2026-04-09 12:00 |
06:44:05.40 |
+46:45:51.8 |
HIP 32361 |
13.67 |
| 2026-04-10 00:00 |
06:44:05.63 |
+46:45:44.8 |
HIP 32361 |
13.69 |
| 2026-04-10 12:00 |
06:44:05.88 |
+46:45:37.8 |
HIP 32361 |
13.71 |
| 2026-04-11 00:00 |
06:44:06.14 |
+46:45:30.8 |
HIP 32361 |
13.72 |
| 2026-04-11 12:00 |
06:44:06.41 |
+46:45:23.8 |
HIP 32361 |
13.73 |
| 2026-04-12 00:00 |
06:44:06.71 |
+46:45:16.8 |
HIP 32361 |
13.74 |
| 2026-04-12 12:00 |
06:44:07.01 |
+46:45:09.8 |
HIP 32361 |
13.76 |
| 2026-04-13 00:00 |
06:44:07.33 |
+46:45:02.8 |
HIP 32361 |
13.77 |
| 2026-04-13 12:00 |
06:44:07.66 |
+46:44:55.8 |
HIP 32361 |
13.77 |
| 2026-04-14 00:00 |
06:44:08.01 |
+46:44:48.8 |
HIP 32361 |
13.78 |
| 2026-04-14 12:00 |
06:44:08.38 |
+46:44:41.9 |
HIP 32361 |
13.79 |
| 2026-04-15 00:00 |
06:44:08.75 |
+46:44:34.9 |
HIP 32361 |
13.80 |
| 2026-04-15 12:00 |
06:44:09.15 |
+46:44:27.9 |
HIP 32361 |
13.80 |
| 2026-04-16 00:00 |
06:44:09.55 |
+46:44:21.0 |
HIP 32361 |
13.81 |