P/2014 W4 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
P/2014 W4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-12-29T12:04:50.476800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:02Z |
| Obs used |
91 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
15.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-14.0000000 |
| e |
0.35307752 |
| q (au) |
4.261090 |
| a (au) |
6.586710 |
| i (deg) |
15.274347 |
| Ω (om, deg) |
33.352591 |
| ω (w, deg) |
67.411788 |
| M (ma, deg) |
353.790386 |
밝기
산란 + 전체 선형
$$
M_a = (6.548 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.548 |
| 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 |
20:24:46.09 |
-33:25:32.2 |
HIP 100728 |
7.49 |
| 2026-02-03 12:00 |
20:25:04.40 |
-33:24:45.9 |
HIP 100728 |
3.96 |
| 2026-02-04 00:00 |
20:25:22.70 |
-33:23:59.8 |
HIP 100728 |
2.39 |
| 2026-02-04 12:00 |
20:25:40.97 |
-33:23:14.0 |
HIP 100728 |
5.10 |
| 2026-02-05 00:00 |
20:25:59.22 |
-33:22:28.4 |
HIP 100814 |
6.98 |
| 2026-02-05 12:00 |
20:26:17.45 |
-33:21:43.2 |
HIP 100814 |
3.82 |
| 2026-02-06 00:00 |
20:26:35.66 |
-33:20:58.2 |
HIP 100814 |
3.26 |
| 2026-02-06 12:00 |
20:26:53.85 |
-33:20:13.5 |
HIP 100814 |
6.06 |
| 2026-02-07 00:00 |
20:27:12.01 |
-33:19:29.0 |
HIP 100814 |
9.63 |
| 2026-02-07 12:00 |
20:27:30.15 |
-33:18:44.9 |
HIP 100960 |
8.42 |
| 2026-02-08 00:00 |
20:27:48.27 |
-33:18:01.0 |
HIP 100960 |
4.59 |
| 2026-02-08 12:00 |
20:28:06.36 |
-33:17:17.5 |
HIP 100960 |
1.02 |
| 2026-02-09 00:00 |
20:28:24.43 |
-33:16:34.2 |
HIP 100960 |
3.25 |
| 2026-02-09 12:00 |
20:28:42.47 |
-33:15:51.2 |
HIP 100960 |
7.04 |
| 2026-02-10 00:00 |
20:29:00.48 |
-33:15:08.5 |
HIP 100960 |
10.86 |
| 2026-02-10 12:00 |
20:29:18.46 |
-33:14:26.2 |
HIP 101106 |
13.74 |
| 2026-02-11 00:00 |
20:29:36.42 |
-33:13:44.1 |
HIP 101177 |
11.83 |
| 2026-02-11 12:00 |
20:29:54.35 |
-33:13:02.3 |
HIP 101177 |
8.12 |
| 2026-02-12 00:00 |
20:30:12.25 |
-33:12:20.8 |
HIP 101177 |
4.61 |
| 2026-02-12 12:00 |
20:30:30.11 |
-33:11:39.7 |
HIP 101177 |
2.35 |
| 2026-02-13 00:00 |
20:30:47.95 |
-33:10:58.8 |
HIP 101177 |
4.32 |
| 2026-02-13 12:00 |
20:31:05.75 |
-33:10:18.3 |
HIP 101177 |
7.78 |
| 2026-02-14 00:00 |
20:31:23.53 |
-33:09:38.1 |
HIP 101177 |
11.44 |
| 2026-02-14 12:00 |
20:31:41.26 |
-33:08:58.2 |
HIP 101177 |
15.15 |
| 2026-02-15 00:00 |
20:31:58.97 |
-33:08:18.7 |
HIP 101177 |
18.88 |
| 2026-02-15 12:00 |
20:32:16.64 |
-33:07:39.4 |
HIP 101459 |
19.43 |
| 2026-02-16 00:00 |
20:32:34.27 |
-33:07:00.5 |
HIP 101459 |
16.19 |
| 2026-02-16 12:00 |
20:32:51.87 |
-33:06:22.0 |
HIP 101459 |
13.22 |
| 2026-02-17 00:00 |
20:33:09.43 |
-33:05:43.8 |
HIP 101459 |
10.75 |
| 2026-02-17 12:00 |
20:33:26.95 |
-33:05:05.9 |
HIP 101459 |
9.16 |
| 2026-02-18 00:00 |
20:33:44.44 |
-33:04:28.3 |
HIP 101459 |
8.95 |
| 2026-02-18 12:00 |
20:34:01.88 |
-33:03:51.1 |
HIP 101459 |
10.18 |
| 2026-02-19 00:00 |
20:34:19.29 |
-33:03:14.3 |
HIP 101459 |
12.42 |
| 2026-02-19 12:00 |
20:34:36.66 |
-33:02:37.8 |
HIP 101584 |
13.99 |
| 2026-02-20 00:00 |
20:34:53.98 |
-33:02:01.7 |
HIP 101584 |
12.84 |
| 2026-02-20 12:00 |
20:35:11.26 |
-33:01:25.9 |
HIP 101584 |
12.69 |
| 2026-02-21 00:00 |
20:35:28.50 |
-33:00:50.5 |
HIP 101584 |
13.55 |
| 2026-02-21 12:00 |
20:35:45.70 |
-33:00:15.4 |
HIP 101584 |
15.26 |
| 2026-02-22 00:00 |
20:36:02.85 |
-32:59:40.7 |
HIP 101584 |
17.56 |
| 2026-02-22 12:00 |
20:36:19.96 |
-32:59:06.4 |
HIP 101584 |
20.24 |
| 2026-02-23 00:00 |
20:36:37.02 |
-32:58:32.4 |
HIP 101656 |
22.07 |
| 2026-02-23 12:00 |
20:36:54.04 |
-32:57:58.8 |
HIP 101656 |
22.30 |
| 2026-02-24 00:00 |
20:37:11.01 |
-32:57:25.6 |
HIP 101656 |
23.10 |