메타데이터
| 항목 |
값 |
| Designation |
C/2015 T4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-06-18T22:43:23.779200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:15Z |
| Obs used |
345 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
16.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-12-16.0000000 |
| e |
0.97361730 |
| q (au) |
2.296377 |
| a (au) |
87.040989 |
| i (deg) |
87.917192 |
| Ω (om, deg) |
251.787616 |
| ω (w, deg) |
270.135756 |
| M (ma, deg) |
359.774313 |
밝기
산란 + 전체 선형
$$
M_a = (8.288 + 5.229\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.288 |
| n |
5.229 |
| gf |
0.998 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
9.998 |
| 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 |
17:30:47.46 |
+33:02:32.5 |
HIP 85593 |
26.00 |
| 2026-03-26 12:00 |
17:30:46.31 |
+33:03:44.3 |
HIP 85593 |
26.77 |
| 2026-03-27 00:00 |
17:30:45.12 |
+33:04:56.1 |
HIP 85593 |
27.56 |
| 2026-03-27 12:00 |
17:30:43.86 |
+33:06:07.7 |
HIP 85593 |
28.38 |
| 2026-03-28 00:00 |
17:30:42.56 |
+33:07:19.2 |
HIP 85593 |
29.22 |
| 2026-03-28 12:00 |
17:30:41.20 |
+33:08:30.6 |
HIP 85593 |
30.07 |
| 2026-03-29 00:00 |
17:30:39.79 |
+33:09:41.9 |
HIP 85593 |
30.95 |
| 2026-03-29 12:00 |
17:30:38.33 |
+33:10:53.1 |
HIP 85593 |
31.84 |
| 2026-03-30 00:00 |
17:30:36.81 |
+33:12:04.2 |
HIP 85593 |
32.75 |
| 2026-03-30 12:00 |
17:30:35.24 |
+33:13:15.2 |
HIP 85850 |
32.92 |
| 2026-03-31 00:00 |
17:30:33.62 |
+33:14:26.0 |
HIP 85850 |
32.45 |
| 2026-03-31 12:00 |
17:30:31.95 |
+33:15:36.7 |
HIP 85850 |
32.03 |
| 2026-04-01 00:00 |
17:30:30.22 |
+33:16:47.2 |
HIP 85850 |
31.66 |
| 2026-04-01 12:00 |
17:30:28.45 |
+33:17:57.7 |
HIP 85850 |
31.34 |
| 2026-04-02 00:00 |
17:30:26.61 |
+33:19:07.9 |
HIP 85850 |
31.08 |
| 2026-04-02 12:00 |
17:30:24.73 |
+33:20:18.0 |
HIP 85556 |
30.30 |
| 2026-04-03 00:00 |
17:30:22.80 |
+33:21:28.0 |
HIP 85556 |
29.10 |
| 2026-04-03 12:00 |
17:30:20.81 |
+33:22:37.8 |
HIP 85556 |
27.91 |
| 2026-04-04 00:00 |
17:30:18.77 |
+33:23:47.5 |
HIP 85556 |
26.72 |
| 2026-04-04 12:00 |
17:30:16.68 |
+33:24:56.9 |
HIP 85556 |
25.53 |
| 2026-04-05 00:00 |
17:30:14.54 |
+33:26:06.2 |
HIP 85556 |
24.34 |
| 2026-04-05 12:00 |
17:30:12.35 |
+33:27:15.3 |
HIP 85556 |
23.15 |
| 2026-04-06 00:00 |
17:30:10.11 |
+33:28:24.3 |
HIP 85556 |
21.96 |
| 2026-04-06 12:00 |
17:30:07.81 |
+33:29:33.0 |
HIP 85556 |
20.77 |
| 2026-04-07 00:00 |
17:30:05.46 |
+33:30:41.6 |
HIP 85556 |
19.59 |
| 2026-04-07 12:00 |
17:30:03.07 |
+33:31:49.9 |
HIP 85556 |
18.41 |
| 2026-04-08 00:00 |
17:30:00.62 |
+33:32:58.1 |
HIP 85556 |
17.23 |
| 2026-04-08 12:00 |
17:29:58.12 |
+33:34:06.0 |
HIP 85556 |
16.06 |
| 2026-04-09 00:00 |
17:29:55.57 |
+33:35:13.8 |
HIP 85556 |
14.89 |
| 2026-04-09 12:00 |
17:29:52.97 |
+33:36:21.3 |
HIP 85556 |
13.73 |
| 2026-04-10 00:00 |
17:29:50.33 |
+33:37:28.6 |
HIP 85556 |
12.59 |
| 2026-04-10 12:00 |
17:29:47.63 |
+33:38:35.7 |
HIP 85556 |
11.46 |
| 2026-04-11 00:00 |
17:29:44.88 |
+33:39:42.5 |
HIP 85556 |
10.35 |
| 2026-04-11 12:00 |
17:29:42.08 |
+33:40:49.1 |
HIP 85556 |
9.27 |
| 2026-04-12 00:00 |
17:29:39.23 |
+33:41:55.5 |
HIP 85556 |
8.24 |
| 2026-04-12 12:00 |
17:29:36.33 |
+33:43:01.6 |
HIP 85556 |
7.26 |
| 2026-04-13 00:00 |
17:29:33.39 |
+33:44:07.4 |
HIP 85556 |
6.38 |
| 2026-04-13 12:00 |
17:29:30.39 |
+33:45:13.0 |
HIP 85556 |
5.63 |
| 2026-04-14 00:00 |
17:29:27.35 |
+33:46:18.4 |
HIP 85556 |
5.08 |
| 2026-04-14 12:00 |
17:29:24.26 |
+33:47:23.5 |
HIP 85556 |
4.78 |
| 2026-04-15 00:00 |
17:29:21.12 |
+33:48:28.3 |
HIP 85556 |
4.81 |
| 2026-04-15 12:00 |
17:29:17.93 |
+33:49:32.8 |
HIP 85556 |
5.14 |
| 2026-04-16 00:00 |
17:29:14.69 |
+33:50:37.0 |
HIP 85556 |
5.73 |