C/2016 C2 (NEOWISE)
메타데이터
| 항목 |
값 |
| Designation |
C/2016 C2 (NEOWISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-04-19T14:19:31.131840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:23Z |
| Obs used |
148 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
20.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-03-12.0000000 |
| e |
0.97563583 |
| q (au) |
1.559754 |
| a (au) |
64.018322 |
| i (deg) |
38.156610 |
| Ω (om, deg) |
24.404634 |
| ω (w, deg) |
214.403353 |
| M (ma, deg) |
359.925732 |
밝기
산란 + 전체 선형
$$
M_a = (14.251 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.251 |
| n |
6.000 |
| 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) |
| 2026-02-03 00:00 |
01:36:35.88 |
+14:43:53.7 |
HIP 7436 |
12.67 |
| 2026-02-03 12:00 |
01:36:37.61 |
+14:44:01.3 |
HIP 7436 |
13.11 |
| 2026-02-04 00:00 |
01:36:39.38 |
+14:44:09.1 |
HIP 7436 |
13.56 |
| 2026-02-04 12:00 |
01:36:41.19 |
+14:44:17.2 |
HIP 7436 |
14.02 |
| 2026-02-05 00:00 |
01:36:43.04 |
+14:44:25.5 |
HIP 7436 |
14.48 |
| 2026-02-05 12:00 |
01:36:44.93 |
+14:44:34.1 |
HIP 7436 |
14.96 |
| 2026-02-06 00:00 |
01:36:46.85 |
+14:44:42.9 |
HIP 7436 |
15.45 |
| 2026-02-06 12:00 |
01:36:48.82 |
+14:44:51.9 |
HIP 7436 |
15.95 |
| 2026-02-07 00:00 |
01:36:50.82 |
+14:45:01.2 |
HIP 7436 |
16.46 |
| 2026-02-07 12:00 |
01:36:52.86 |
+14:45:10.7 |
HIP 7436 |
16.97 |
| 2026-02-08 00:00 |
01:36:54.94 |
+14:45:20.4 |
HIP 7436 |
17.50 |
| 2026-02-08 12:00 |
01:36:57.06 |
+14:45:30.4 |
HIP 7436 |
18.04 |
| 2026-02-09 00:00 |
01:36:59.21 |
+14:45:40.6 |
HIP 7436 |
18.59 |
| 2026-02-09 12:00 |
01:37:01.40 |
+14:45:51.0 |
HIP 7436 |
19.15 |
| 2026-02-10 00:00 |
01:37:03.63 |
+14:46:01.7 |
HIP 7436 |
19.71 |
| 2026-02-10 12:00 |
01:37:05.89 |
+14:46:12.6 |
HIP 7436 |
20.29 |
| 2026-02-11 00:00 |
01:37:08.20 |
+14:46:23.7 |
HIP 7436 |
20.88 |
| 2026-02-11 12:00 |
01:37:10.53 |
+14:46:35.1 |
HIP 7436 |
21.47 |
| 2026-02-12 00:00 |
01:37:12.91 |
+14:46:46.7 |
HIP 7436 |
22.08 |
| 2026-02-12 12:00 |
01:37:15.32 |
+14:46:58.5 |
HIP 7436 |
22.69 |
| 2026-02-13 00:00 |
01:37:17.77 |
+14:47:10.5 |
HIP 7436 |
23.32 |
| 2026-02-13 12:00 |
01:37:20.25 |
+14:47:22.8 |
HIP 7436 |
23.95 |
| 2026-02-14 00:00 |
01:37:22.77 |
+14:47:35.3 |
HIP 7436 |
24.59 |
| 2026-02-14 12:00 |
01:37:25.32 |
+14:47:48.0 |
HIP 7436 |
25.25 |
| 2026-02-15 00:00 |
01:37:27.91 |
+14:48:00.9 |
HIP 7436 |
25.91 |
| 2026-02-15 12:00 |
01:37:30.53 |
+14:48:14.1 |
HIP 7436 |
26.58 |
| 2026-02-16 00:00 |
01:37:33.19 |
+14:48:27.5 |
HIP 7436 |
27.26 |
| 2026-02-16 12:00 |
01:37:35.89 |
+14:48:41.1 |
HIP 7436 |
27.95 |
| 2026-02-17 00:00 |
01:37:38.61 |
+14:48:54.9 |
HIP 7436 |
28.65 |
| 2026-02-17 12:00 |
01:37:41.38 |
+14:49:08.9 |
HIP 7508 |
29.08 |
| 2026-02-18 00:00 |
01:37:44.17 |
+14:49:23.2 |
HIP 7508 |
29.19 |
| 2026-02-18 12:00 |
01:37:47.00 |
+14:49:37.6 |
HIP 7508 |
29.32 |
| 2026-02-19 00:00 |
01:37:49.86 |
+14:49:52.3 |
HIP 7508 |
29.47 |
| 2026-02-19 12:00 |
01:37:52.76 |
+14:50:07.2 |
HIP 7508 |
29.63 |
| 2026-02-20 00:00 |
01:37:55.69 |
+14:50:22.3 |
HIP 7508 |
29.82 |
| 2026-02-20 12:00 |
01:37:58.65 |
+14:50:37.6 |
HIP 7508 |
30.02 |
| 2026-02-21 00:00 |
01:38:01.64 |
+14:50:53.2 |
HIP 7508 |
30.25 |
| 2026-02-21 12:00 |
01:38:04.66 |
+14:51:08.9 |
HIP 7508 |
30.49 |
| 2026-02-22 00:00 |
01:38:07.72 |
+14:51:24.9 |
HIP 7508 |
30.76 |
| 2026-02-22 12:00 |
01:38:10.81 |
+14:51:41.0 |
HIP 7508 |
31.04 |
| 2026-02-23 00:00 |
01:38:13.93 |
+14:51:57.4 |
HIP 7508 |
31.34 |
| 2026-02-23 12:00 |
01:38:17.08 |
+14:52:13.9 |
HIP 7508 |
31.67 |
| 2026-02-24 00:00 |
01:38:20.26 |
+14:52:30.7 |
HIP 7508 |
32.01 |