메타데이터
| 항목 |
값 |
| Designation |
C/2015 GX (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-26T15:53:06.691200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:09Z |
| Obs used |
318 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
7.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-13.0000000 |
| e |
0.87819882 |
| q (au) |
1.971753 |
| a (au) |
16.188294 |
| i (deg) |
90.254528 |
| Ω (om, deg) |
235.515503 |
| ω (w, deg) |
108.957919 |
| M (ma, deg) |
0.262364 |
밝기
산란 + 전체 선형
$$
M_a = (8.937 + 5.219\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.937 |
| n |
5.219 |
| gf |
0.999 |
| gb |
-0.627 |
| 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) |
| 2026-07-29 00:00 |
06:03:01.15 |
-62:44:56.0 |
HIP 28465 |
17.00 |
| 2026-07-29 12:00 |
06:03:11.81 |
-62:45:52.1 |
HIP 28465 |
18.01 |
| 2026-07-30 00:00 |
06:03:22.41 |
-62:46:48.7 |
HIP 28465 |
19.08 |
| 2026-07-30 12:00 |
06:03:32.97 |
-62:47:45.9 |
HIP 28465 |
20.21 |
| 2026-07-31 00:00 |
06:03:43.47 |
-62:48:43.5 |
HIP 28465 |
21.38 |
| 2026-07-31 12:00 |
06:03:53.92 |
-62:49:41.7 |
HIP 28964 |
21.30 |
| 2026-08-01 00:00 |
06:04:04.32 |
-62:50:40.4 |
HIP 28964 |
20.66 |
| 2026-08-01 12:00 |
06:04:14.66 |
-62:51:39.6 |
HIP 28964 |
20.12 |
| 2026-08-02 00:00 |
06:04:24.96 |
-62:52:39.4 |
HIP 28964 |
19.70 |
| 2026-08-02 12:00 |
06:04:35.19 |
-62:53:39.6 |
HIP 28964 |
19.41 |
| 2026-08-03 00:00 |
06:04:45.38 |
-62:54:40.3 |
HIP 28964 |
19.25 |
| 2026-08-03 12:00 |
06:04:55.51 |
-62:55:41.6 |
HIP 28964 |
19.22 |
| 2026-08-04 00:00 |
06:05:05.58 |
-62:56:43.3 |
HIP 28964 |
19.32 |
| 2026-08-04 12:00 |
06:05:15.60 |
-62:57:45.5 |
HIP 28964 |
19.56 |
| 2026-08-05 00:00 |
06:05:25.56 |
-62:58:48.2 |
HIP 28964 |
19.93 |
| 2026-08-05 12:00 |
06:05:35.46 |
-62:59:51.5 |
HIP 28964 |
20.42 |
| 2026-08-06 00:00 |
06:05:45.30 |
-63:00:55.2 |
HIP 28964 |
21.02 |
| 2026-08-06 12:00 |
06:05:55.09 |
-63:01:59.4 |
HIP 29112 |
19.98 |
| 2026-08-07 00:00 |
06:06:04.81 |
-63:03:04.0 |
HIP 29112 |
18.46 |
| 2026-08-07 12:00 |
06:06:14.48 |
-63:04:09.2 |
HIP 29112 |
16.95 |
| 2026-08-08 00:00 |
06:06:24.08 |
-63:05:14.8 |
HIP 29112 |
15.44 |
| 2026-08-08 12:00 |
06:06:33.62 |
-63:06:20.9 |
HIP 29112 |
13.95 |
| 2026-08-09 00:00 |
06:06:43.10 |
-63:07:27.5 |
HIP 29112 |
12.47 |
| 2026-08-09 12:00 |
06:06:52.52 |
-63:08:34.6 |
HIP 29112 |
11.02 |
| 2026-08-10 00:00 |
06:07:01.87 |
-63:09:42.1 |
HIP 29112 |
9.59 |
| 2026-08-10 12:00 |
06:07:11.16 |
-63:10:50.1 |
HIP 29112 |
8.22 |
| 2026-08-11 00:00 |
06:07:20.38 |
-63:11:58.5 |
HIP 29112 |
6.93 |
| 2026-08-11 12:00 |
06:07:29.54 |
-63:13:07.4 |
HIP 29112 |
5.76 |
| 2026-08-12 00:00 |
06:07:38.63 |
-63:14:16.7 |
HIP 29112 |
4.83 |
| 2026-08-12 12:00 |
06:07:47.65 |
-63:15:26.5 |
HIP 29112 |
4.28 |
| 2026-08-13 00:00 |
06:07:56.61 |
-63:16:36.7 |
HIP 29112 |
4.27 |
| 2026-08-13 12:00 |
06:08:05.49 |
-63:17:47.4 |
HIP 29112 |
4.79 |
| 2026-08-14 00:00 |
06:08:14.31 |
-63:18:58.5 |
HIP 29112 |
5.70 |
| 2026-08-14 12:00 |
06:08:23.06 |
-63:20:10.1 |
HIP 29112 |
6.85 |
| 2026-08-15 00:00 |
06:08:31.74 |
-63:21:22.0 |
HIP 29112 |
8.14 |
| 2026-08-15 12:00 |
06:08:40.34 |
-63:22:34.4 |
HIP 29112 |
9.51 |
| 2026-08-16 00:00 |
06:08:48.87 |
-63:23:47.2 |
HIP 29112 |
10.94 |
| 2026-08-16 12:00 |
06:08:57.34 |
-63:25:00.4 |
HIP 29112 |
12.39 |
| 2026-08-17 00:00 |
06:09:05.72 |
-63:26:14.1 |
HIP 29112 |
13.87 |
| 2026-08-17 12:00 |
06:09:14.04 |
-63:27:28.1 |
HIP 29112 |
15.36 |
| 2026-08-18 00:00 |
06:09:22.28 |
-63:28:42.5 |
HIP 29331 |
16.70 |
| 2026-08-18 12:00 |
06:09:30.44 |
-63:29:57.3 |
HIP 29331 |
17.06 |
| 2026-08-19 00:00 |
06:09:38.53 |
-63:31:12.6 |
HIP 29331 |
17.56 |