메타데이터
| 항목 |
값 |
| Designation |
C/2014 W9 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-02-15T16:56:21.163200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:03Z |
| Obs used |
120 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
13.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-01-29.0000000 |
| e |
0.85784434 |
| q (au) |
1.587455 |
| a (au) |
11.167021 |
| i (deg) |
10.630531 |
| Ω (om, deg) |
21.288616 |
| ω (w, deg) |
167.769440 |
| M (ma, deg) |
359.532358 |
밝기
산란 + 전체 선형
$$
M_a = (14.130 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.130 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.833 |
| k |
0.986 |
| δ90 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
00:10:24.44 |
-03:24:33.5 |
HIP 906 |
12.45 |
| 2026-06-01 12:00 |
00:10:27.12 |
-03:24:21.4 |
HIP 906 |
11.76 |
| 2026-06-02 00:00 |
00:10:29.74 |
-03:24:09.5 |
HIP 906 |
11.08 |
| 2026-06-02 12:00 |
00:10:32.33 |
-03:23:58.0 |
HIP 906 |
10.42 |
| 2026-06-03 00:00 |
00:10:34.87 |
-03:23:46.7 |
HIP 906 |
9.77 |
| 2026-06-03 12:00 |
00:10:37.37 |
-03:23:35.8 |
HIP 906 |
9.13 |
| 2026-06-04 00:00 |
00:10:39.83 |
-03:23:25.1 |
HIP 906 |
8.51 |
| 2026-06-04 12:00 |
00:10:42.24 |
-03:23:14.8 |
HIP 906 |
7.90 |
| 2026-06-05 00:00 |
00:10:44.61 |
-03:23:04.7 |
HIP 906 |
7.31 |
| 2026-06-05 12:00 |
00:10:46.94 |
-03:22:55.0 |
HIP 906 |
6.73 |
| 2026-06-06 00:00 |
00:10:49.22 |
-03:22:45.6 |
HIP 906 |
6.17 |
| 2026-06-06 12:00 |
00:10:51.46 |
-03:22:36.5 |
HIP 906 |
5.62 |
| 2026-06-07 00:00 |
00:10:53.66 |
-03:22:27.6 |
HIP 906 |
5.10 |
| 2026-06-07 12:00 |
00:10:55.81 |
-03:22:19.1 |
HIP 906 |
4.60 |
| 2026-06-08 00:00 |
00:10:57.91 |
-03:22:11.0 |
HIP 906 |
4.12 |
| 2026-06-08 12:00 |
00:10:59.97 |
-03:22:03.1 |
HIP 906 |
3.67 |
| 2026-06-09 00:00 |
00:11:01.99 |
-03:21:55.5 |
HIP 906 |
3.26 |
| 2026-06-09 12:00 |
00:11:03.96 |
-03:21:48.3 |
HIP 906 |
2.89 |
| 2026-06-10 00:00 |
00:11:05.88 |
-03:21:41.3 |
HIP 906 |
2.58 |
| 2026-06-10 12:00 |
00:11:07.76 |
-03:21:34.7 |
HIP 906 |
2.34 |
| 2026-06-11 00:00 |
00:11:09.60 |
-03:21:28.4 |
HIP 906 |
2.19 |
| 2026-06-11 12:00 |
00:11:11.39 |
-03:21:22.4 |
HIP 906 |
2.14 |
| 2026-06-12 00:00 |
00:11:13.13 |
-03:21:16.7 |
HIP 906 |
2.18 |
| 2026-06-12 12:00 |
00:11:14.83 |
-03:21:11.3 |
HIP 906 |
2.31 |
| 2026-06-13 00:00 |
00:11:16.47 |
-03:21:06.3 |
HIP 906 |
2.50 |
| 2026-06-13 12:00 |
00:11:18.08 |
-03:21:01.5 |
HIP 906 |
2.74 |
| 2026-06-14 00:00 |
00:11:19.64 |
-03:20:57.1 |
HIP 906 |
3.00 |
| 2026-06-14 12:00 |
00:11:21.15 |
-03:20:53.0 |
HIP 906 |
3.29 |
| 2026-06-15 00:00 |
00:11:22.61 |
-03:20:49.3 |
HIP 906 |
3.59 |
| 2026-06-15 12:00 |
00:11:24.02 |
-03:20:45.8 |
HIP 906 |
3.89 |
| 2026-06-16 00:00 |
00:11:25.39 |
-03:20:42.7 |
HIP 906 |
4.19 |
| 2026-06-16 12:00 |
00:11:26.71 |
-03:20:39.9 |
HIP 906 |
4.48 |
| 2026-06-17 00:00 |
00:11:27.99 |
-03:20:37.4 |
HIP 906 |
4.77 |
| 2026-06-17 12:00 |
00:11:29.22 |
-03:20:35.2 |
HIP 906 |
5.06 |
| 2026-06-18 00:00 |
00:11:30.39 |
-03:20:33.3 |
HIP 906 |
5.34 |
| 2026-06-18 12:00 |
00:11:31.53 |
-03:20:31.8 |
HIP 906 |
5.61 |
| 2026-06-19 00:00 |
00:11:32.61 |
-03:20:30.6 |
HIP 906 |
5.87 |
| 2026-06-19 12:00 |
00:11:33.65 |
-03:20:29.7 |
HIP 906 |
6.12 |
| 2026-06-20 00:00 |
00:11:34.63 |
-03:20:29.1 |
HIP 906 |
6.36 |
| 2026-06-20 12:00 |
00:11:35.57 |
-03:20:28.9 |
HIP 906 |
6.59 |
| 2026-06-21 00:00 |
00:11:36.47 |
-03:20:28.9 |
HIP 906 |
6.80 |
| 2026-06-21 12:00 |
00:11:37.31 |
-03:20:29.3 |
HIP 906 |
7.01 |
| 2026-06-22 00:00 |
00:11:38.11 |
-03:20:30.0 |
HIP 906 |
7.21 |