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) |
| 2026-09-20 00:00 |
20:28:58.15 |
-35:57:52.8 |
HIP 100990 |
14.73 |
| 2026-09-20 12:00 |
20:28:52.34 |
-35:57:17.4 |
HIP 100990 |
14.93 |
| 2026-09-21 00:00 |
20:28:46.66 |
-35:56:41.3 |
HIP 100990 |
15.25 |
| 2026-09-21 12:00 |
20:28:41.12 |
-35:56:04.5 |
HIP 100990 |
15.69 |
| 2026-09-22 00:00 |
20:28:35.70 |
-35:55:27.1 |
HIP 100990 |
16.22 |
| 2026-09-22 12:00 |
20:28:30.42 |
-35:54:49.1 |
HIP 100990 |
16.85 |
| 2026-09-23 00:00 |
20:28:25.28 |
-35:54:10.5 |
HIP 100990 |
17.54 |
| 2026-09-23 12:00 |
20:28:20.27 |
-35:53:31.2 |
HIP 100990 |
18.30 |
| 2026-09-24 00:00 |
20:28:15.39 |
-35:52:51.3 |
HIP 101017 |
18.25 |
| 2026-09-24 12:00 |
20:28:10.65 |
-35:52:10.8 |
HIP 101017 |
17.99 |
| 2026-09-25 00:00 |
20:28:06.04 |
-35:51:29.7 |
HIP 101017 |
17.78 |
| 2026-09-25 12:00 |
20:28:01.57 |
-35:50:48.0 |
HIP 101017 |
17.62 |
| 2026-09-26 00:00 |
20:27:57.23 |
-35:50:05.7 |
HIP 101017 |
17.51 |
| 2026-09-26 12:00 |
20:27:53.03 |
-35:49:22.8 |
HIP 101017 |
17.45 |
| 2026-09-27 00:00 |
20:27:48.97 |
-35:48:39.2 |
HIP 101017 |
17.44 |
| 2026-09-27 12:00 |
20:27:45.05 |
-35:47:55.1 |
HIP 101017 |
17.46 |
| 2026-09-28 00:00 |
20:27:41.26 |
-35:47:10.5 |
HIP 101017 |
17.53 |
| 2026-09-28 12:00 |
20:27:37.61 |
-35:46:25.2 |
HIP 101017 |
17.63 |
| 2026-09-29 00:00 |
20:27:34.10 |
-35:45:39.4 |
HIP 101017 |
17.77 |
| 2026-09-29 12:00 |
20:27:30.72 |
-35:44:53.0 |
HIP 101017 |
17.94 |
| 2026-09-30 00:00 |
20:27:27.49 |
-35:44:06.0 |
HIP 101017 |
18.13 |
| 2026-09-30 12:00 |
20:27:24.39 |
-35:43:18.5 |
HIP 101017 |
18.36 |
| 2026-10-01 00:00 |
20:27:21.43 |
-35:42:30.5 |
HIP 101017 |
18.60 |
| 2026-10-01 12:00 |
20:27:18.62 |
-35:41:41.8 |
HIP 101017 |
18.86 |
| 2026-10-02 00:00 |
20:27:15.94 |
-35:40:52.7 |
HIP 101017 |
19.15 |
| 2026-10-02 12:00 |
20:27:13.40 |
-35:40:02.9 |
HIP 101017 |
19.45 |
| 2026-10-03 00:00 |
20:27:11.00 |
-35:39:12.7 |
HIP 101017 |
19.76 |
| 2026-10-03 12:00 |
20:27:08.75 |
-35:38:21.9 |
HIP 101017 |
20.09 |
| 2026-10-04 00:00 |
20:27:06.63 |
-35:37:30.6 |
HIP 101017 |
20.42 |
| 2026-10-04 12:00 |
20:27:04.66 |
-35:36:38.7 |
HIP 101017 |
20.77 |
| 2026-10-05 00:00 |
20:27:02.82 |
-35:35:46.4 |
HIP 101017 |
21.12 |
| 2026-10-05 12:00 |
20:27:01.13 |
-35:34:53.5 |
HIP 101017 |
21.49 |
| 2026-10-06 00:00 |
20:26:59.58 |
-35:34:00.1 |
HIP 101017 |
21.86 |
| 2026-10-06 12:00 |
20:26:58.18 |
-35:33:06.2 |
HIP 101017 |
22.23 |
| 2026-10-07 00:00 |
20:26:56.91 |
-35:32:11.8 |
HIP 101017 |
22.61 |
| 2026-10-07 12:00 |
20:26:55.79 |
-35:31:16.9 |
HIP 101017 |
23.00 |
| 2026-10-08 00:00 |
20:26:54.81 |
-35:30:21.5 |
HIP 101017 |
23.40 |
| 2026-10-08 12:00 |
20:26:53.97 |
-35:29:25.6 |
HIP 101017 |
23.79 |
| 2026-10-09 00:00 |
20:26:53.28 |
-35:28:29.2 |
HIP 101017 |
24.20 |
| 2026-10-09 12:00 |
20:26:52.73 |
-35:27:32.4 |
HIP 101021 |
24.53 |
| 2026-10-10 00:00 |
20:26:52.32 |
-35:26:35.1 |
HIP 101021 |
24.41 |
| 2026-10-10 12:00 |
20:26:52.05 |
-35:25:37.3 |
HIP 101021 |
24.29 |
| 2026-10-11 00:00 |
20:26:51.93 |
-35:24:39.0 |
HIP 101021 |
24.19 |