메타데이터
| 항목 |
값 |
| Designation |
C/2016 B1 (NEOWISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-12-04T17:12:22.285440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:22Z |
| Obs used |
522 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
8.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-03-28.0000000 |
| e |
0.99239477 |
| q (au) |
3.206199 |
| a (au) |
421.578150 |
| i (deg) |
50.476159 |
| Ω (om, deg) |
231.954169 |
| ω (w, deg) |
8.559465 |
| M (ma, deg) |
0.012899 |
밝기
산란 + 전체 선형
$$
M_a = (8.995 + 3.769\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.995 |
| n |
3.769 |
| gf |
1.000 |
| gb |
-0.508 |
| 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 |
00:53:46.03 |
+33:53:52.5 |
HIP 4175 |
5.75 |
| 2026-03-26 12:00 |
00:53:52.41 |
+33:54:09.8 |
HIP 4175 |
6.98 |
| 2026-03-27 00:00 |
00:53:58.81 |
+33:54:27.4 |
HIP 4175 |
8.24 |
| 2026-03-27 12:00 |
00:54:05.20 |
+33:54:45.3 |
HIP 4175 |
9.54 |
| 2026-03-28 00:00 |
00:54:11.60 |
+33:55:03.5 |
HIP 4175 |
10.85 |
| 2026-03-28 12:00 |
00:54:18.01 |
+33:55:22.1 |
HIP 4175 |
12.17 |
| 2026-03-29 00:00 |
00:54:24.42 |
+33:55:40.9 |
HIP 4175 |
13.50 |
| 2026-03-29 12:00 |
00:54:30.83 |
+33:56:00.1 |
HIP 4175 |
14.84 |
| 2026-03-30 00:00 |
00:54:37.25 |
+33:56:19.6 |
HIP 4175 |
16.18 |
| 2026-03-30 12:00 |
00:54:43.67 |
+33:56:39.4 |
HIP 4175 |
17.53 |
| 2026-03-31 00:00 |
00:54:50.09 |
+33:56:59.4 |
HIP 4175 |
18.88 |
| 2026-03-31 12:00 |
00:54:56.52 |
+33:57:19.8 |
HIP 4175 |
20.24 |
| 2026-04-01 00:00 |
00:55:02.95 |
+33:57:40.5 |
HIP 4175 |
21.60 |
| 2026-04-01 12:00 |
00:55:09.38 |
+33:58:01.5 |
HIP 4175 |
22.96 |
| 2026-04-02 00:00 |
00:55:15.81 |
+33:58:22.8 |
HIP 4175 |
24.33 |
| 2026-04-02 12:00 |
00:55:22.24 |
+33:58:44.4 |
HIP 4175 |
25.69 |
| 2026-04-03 00:00 |
00:55:28.67 |
+33:59:06.3 |
HIP 4175 |
27.06 |
| 2026-04-03 12:00 |
00:55:35.10 |
+33:59:28.4 |
HIP 4495 |
27.29 |
| 2026-04-04 00:00 |
00:55:41.54 |
+33:59:50.9 |
HIP 4495 |
25.92 |
| 2026-04-04 12:00 |
00:55:47.97 |
+34:00:13.6 |
HIP 4495 |
24.55 |
| 2026-04-05 00:00 |
00:55:54.40 |
+34:00:36.7 |
HIP 4495 |
23.17 |
| 2026-04-05 12:00 |
00:56:00.83 |
+34:01:00.0 |
HIP 4495 |
21.80 |
| 2026-04-06 00:00 |
00:56:07.26 |
+34:01:23.6 |
HIP 4495 |
20.43 |
| 2026-04-06 12:00 |
00:56:13.69 |
+34:01:47.5 |
HIP 4495 |
19.06 |
| 2026-04-07 00:00 |
00:56:20.11 |
+34:02:11.6 |
HIP 4495 |
17.69 |
| 2026-04-07 12:00 |
00:56:26.54 |
+34:02:36.1 |
HIP 4495 |
16.32 |
| 2026-04-08 00:00 |
00:56:32.96 |
+34:03:00.8 |
HIP 4495 |
14.95 |
| 2026-04-08 12:00 |
00:56:39.38 |
+34:03:25.8 |
HIP 4495 |
13.59 |
| 2026-04-09 00:00 |
00:56:45.79 |
+34:03:51.1 |
HIP 4495 |
12.23 |
| 2026-04-09 12:00 |
00:56:52.20 |
+34:04:16.6 |
HIP 4495 |
10.88 |
| 2026-04-10 00:00 |
00:56:58.61 |
+34:04:42.4 |
HIP 4495 |
9.54 |
| 2026-04-10 12:00 |
00:57:05.02 |
+34:05:08.5 |
HIP 4495 |
8.21 |
| 2026-04-11 00:00 |
00:57:11.41 |
+34:05:34.8 |
HIP 4495 |
6.92 |
| 2026-04-11 12:00 |
00:57:17.81 |
+34:06:01.4 |
HIP 4495 |
5.66 |
| 2026-04-12 00:00 |
00:57:24.20 |
+34:06:28.3 |
HIP 4495 |
4.49 |
| 2026-04-12 12:00 |
00:57:30.58 |
+34:06:55.4 |
HIP 4495 |
3.48 |
| 2026-04-13 00:00 |
00:57:36.95 |
+34:07:22.7 |
HIP 4495 |
2.82 |
| 2026-04-13 12:00 |
00:57:43.32 |
+34:07:50.4 |
HIP 4495 |
2.77 |
| 2026-04-14 00:00 |
00:57:49.69 |
+34:08:18.3 |
HIP 4495 |
3.35 |
| 2026-04-14 12:00 |
00:57:56.04 |
+34:08:46.4 |
HIP 4495 |
4.32 |
| 2026-04-15 00:00 |
00:58:02.39 |
+34:09:14.8 |
HIP 4495 |
5.48 |
| 2026-04-15 12:00 |
00:58:08.73 |
+34:09:43.4 |
HIP 4495 |
6.72 |
| 2026-04-16 00:00 |
00:58:15.06 |
+34:10:12.3 |
HIP 4495 |
8.02 |