메타데이터
| 항목 |
값 |
| Designation |
C/2022 F2 (NEOWISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-03-23T11:03:25.447680Z |
| Orbit solution date (soln_date, UTC) |
2022-08-26T23:42:58Z |
| Obs used |
108 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
4.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2022-03-30T17:17:39.840000Z |
| Discovery magnitude (MPC) |
17.00 R |
| Discovery observatory (MPC) |
C51 · WISE |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-04-15.0000000 |
| e |
0.93379045 |
| q (au) |
1.585007 |
| a (au) |
23.939247 |
| i (deg) |
97.293167 |
| Ω (om, deg) |
58.694002 |
| ω (w, deg) |
200.628782 |
| M (ma, deg) |
0.189661 |
밝기
산란 + 전체 선형
$$
M_a = (16.560 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.560 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.848 |
| k |
0.800 |
| 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 |
03:52:54.78 |
+04:04:12.9 |
HIP 18197 |
9.52 |
| 2026-03-26 12:00 |
03:52:59.74 |
+04:05:21.8 |
HIP 18197 |
8.53 |
| 2026-03-27 00:00 |
03:53:04.76 |
+04:06:30.6 |
HIP 18197 |
7.78 |
| 2026-03-27 12:00 |
03:53:09.83 |
+04:07:39.3 |
HIP 18197 |
7.33 |
| 2026-03-28 00:00 |
03:53:14.96 |
+04:08:47.9 |
HIP 18197 |
7.25 |
| 2026-03-28 12:00 |
03:53:20.15 |
+04:09:56.4 |
HIP 18197 |
7.57 |
| 2026-03-29 00:00 |
03:53:25.40 |
+04:11:04.8 |
HIP 18197 |
8.23 |
| 2026-03-29 12:00 |
03:53:30.70 |
+04:12:13.1 |
HIP 18197 |
9.18 |
| 2026-03-30 00:00 |
03:53:36.05 |
+04:13:21.2 |
HIP 18197 |
10.34 |
| 2026-03-30 12:00 |
03:53:41.46 |
+04:14:29.3 |
HIP 18197 |
11.65 |
| 2026-03-31 00:00 |
03:53:46.93 |
+04:15:37.2 |
HIP 18284 |
12.46 |
| 2026-03-31 12:00 |
03:53:52.45 |
+04:16:45.0 |
HIP 18284 |
11.13 |
| 2026-04-01 00:00 |
03:53:58.02 |
+04:17:52.6 |
HIP 18284 |
9.93 |
| 2026-04-01 12:00 |
03:54:03.64 |
+04:19:00.1 |
HIP 18284 |
8.92 |
| 2026-04-02 00:00 |
03:54:09.32 |
+04:20:07.5 |
HIP 18284 |
8.16 |
| 2026-04-02 12:00 |
03:54:15.05 |
+04:21:14.8 |
HIP 18284 |
7.75 |
| 2026-04-03 00:00 |
03:54:20.83 |
+04:22:21.9 |
HIP 18284 |
7.75 |
| 2026-04-03 12:00 |
03:54:26.66 |
+04:23:28.9 |
HIP 18284 |
8.16 |
| 2026-04-04 00:00 |
03:54:32.54 |
+04:24:35.8 |
HIP 18284 |
8.93 |
| 2026-04-04 12:00 |
03:54:38.47 |
+04:25:42.5 |
HIP 18284 |
9.98 |
| 2026-04-05 00:00 |
03:54:44.45 |
+04:26:49.0 |
HIP 18284 |
11.24 |
| 2026-04-05 12:00 |
03:54:50.48 |
+04:27:55.4 |
HIP 18284 |
12.65 |
| 2026-04-06 00:00 |
03:54:56.56 |
+04:29:01.7 |
HIP 18284 |
14.17 |
| 2026-04-06 12:00 |
03:55:02.68 |
+04:30:07.8 |
HIP 18284 |
15.77 |
| 2026-04-07 00:00 |
03:55:08.85 |
+04:31:13.8 |
HIP 18284 |
17.42 |
| 2026-04-07 12:00 |
03:55:15.07 |
+04:32:19.5 |
HIP 18284 |
19.13 |
| 2026-04-08 00:00 |
03:55:21.34 |
+04:33:25.2 |
HIP 18385 |
19.39 |
| 2026-04-08 12:00 |
03:55:27.65 |
+04:34:30.7 |
HIP 18385 |
17.85 |
| 2026-04-09 00:00 |
03:55:34.01 |
+04:35:36.0 |
HIP 18385 |
16.40 |
| 2026-04-09 12:00 |
03:55:40.42 |
+04:36:41.1 |
HIP 18385 |
15.05 |
| 2026-04-10 00:00 |
03:55:46.86 |
+04:37:46.1 |
HIP 18385 |
13.84 |
| 2026-04-10 12:00 |
03:55:53.36 |
+04:38:50.9 |
HIP 18385 |
12.81 |
| 2026-04-11 00:00 |
03:55:59.89 |
+04:39:55.5 |
HIP 18385 |
12.02 |
| 2026-04-11 12:00 |
03:56:06.47 |
+04:41:00.0 |
HIP 18385 |
11.52 |
| 2026-04-12 00:00 |
03:56:13.09 |
+04:42:04.3 |
HIP 18385 |
11.35 |
| 2026-04-12 12:00 |
03:56:19.76 |
+04:43:08.4 |
HIP 18385 |
11.52 |
| 2026-04-13 00:00 |
03:56:26.46 |
+04:44:12.3 |
HIP 18385 |
12.03 |
| 2026-04-13 12:00 |
03:56:33.21 |
+04:45:16.0 |
HIP 18385 |
12.84 |
| 2026-04-14 00:00 |
03:56:40.00 |
+04:46:19.6 |
HIP 18385 |
13.90 |
| 2026-04-14 12:00 |
03:56:46.83 |
+04:47:22.9 |
HIP 18385 |
15.16 |
| 2026-04-15 00:00 |
03:56:53.69 |
+04:48:26.1 |
HIP 18385 |
16.58 |
| 2026-04-15 12:00 |
03:57:00.60 |
+04:49:29.0 |
HIP 18385 |
18.12 |
| 2026-04-16 00:00 |
03:57:07.55 |
+04:50:31.8 |
HIP 18385 |
19.76 |