메타데이터
| 항목 |
값 |
| Designation |
P/2013 G4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-02-09T16:30:18.377280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:32Z |
| Obs used |
41 |
| NEO |
- |
| M1 |
15.100 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-04-25.0000000 |
| e |
0.41041543 |
| q (au) |
2.613194 |
| a (au) |
4.432263 |
| i (deg) |
5.925606 |
| Ω (om, deg) |
339.772839 |
| ω (w, deg) |
214.390935 |
| M (ma, deg) |
7.849220 |
밝기
산란 + 전체 선형
$$
M_a = (19.266 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.266 |
| n |
2.000 |
| gf |
0.995 |
| gb |
-0.647 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
00:21:17.98 |
+04:19:43.0 |
HIP 1628 |
30.45 |
| 2026-05-12 12:00 |
00:21:33.94 |
+04:21:40.6 |
HIP 1628 |
30.87 |
| 2026-05-13 00:00 |
00:21:49.83 |
+04:23:37.9 |
HIP 1628 |
31.89 |
| 2026-05-13 12:00 |
00:22:05.65 |
+04:25:34.7 |
HIP 1628 |
33.46 |
| 2026-05-14 00:00 |
00:22:21.39 |
+04:27:31.1 |
HIP 1628 |
35.49 |
| 2026-05-14 12:00 |
00:22:37.07 |
+04:29:27.1 |
HIP 1628 |
37.92 |
| 2026-05-15 00:00 |
00:22:52.67 |
+04:31:22.7 |
HIP 1628 |
40.65 |
| 2026-05-15 12:00 |
00:23:08.19 |
+04:33:17.9 |
HIP 1770 |
41.70 |
| 2026-05-16 00:00 |
00:23:23.64 |
+04:35:12.6 |
HIP 1770 |
41.09 |
| 2026-05-16 12:00 |
00:23:39.02 |
+04:37:06.9 |
HIP 1770 |
40.92 |
| 2026-05-17 00:00 |
00:23:54.32 |
+04:39:00.7 |
HIP 1770 |
41.20 |
| 2026-05-17 12:00 |
00:24:09.55 |
+04:40:54.1 |
HIP 1770 |
41.90 |
| 2026-05-18 00:00 |
00:24:24.69 |
+04:42:47.1 |
HIP 1770 |
43.00 |
| 2026-05-18 12:00 |
00:24:39.76 |
+04:44:39.5 |
HIP 2165 |
42.90 |
| 2026-05-19 00:00 |
00:24:54.75 |
+04:46:31.6 |
HIP 2165 |
38.74 |
| 2026-05-19 12:00 |
00:25:09.66 |
+04:48:23.1 |
HIP 2165 |
34.61 |
| 2026-05-20 00:00 |
00:25:24.49 |
+04:50:14.2 |
HIP 2165 |
30.50 |
| 2026-05-20 12:00 |
00:25:39.24 |
+04:52:04.9 |
HIP 2165 |
26.41 |
| 2026-05-21 00:00 |
00:25:53.91 |
+04:53:55.0 |
HIP 2165 |
22.36 |
| 2026-05-21 12:00 |
00:26:08.50 |
+04:55:44.7 |
HIP 2165 |
18.35 |
| 2026-05-22 00:00 |
00:26:23.00 |
+04:57:33.9 |
HIP 2165 |
14.40 |
| 2026-05-22 12:00 |
00:26:37.42 |
+04:59:22.6 |
HIP 2165 |
10.53 |
| 2026-05-23 00:00 |
00:26:51.76 |
+05:01:10.8 |
HIP 2165 |
6.87 |
| 2026-05-23 12:00 |
00:27:06.01 |
+05:02:58.5 |
HIP 2165 |
3.95 |
| 2026-05-24 00:00 |
00:27:20.18 |
+05:04:45.7 |
HIP 2165 |
3.95 |
| 2026-05-24 12:00 |
00:27:34.26 |
+05:06:32.5 |
HIP 2165 |
6.82 |
| 2026-05-25 00:00 |
00:27:48.26 |
+05:08:18.7 |
HIP 2165 |
10.40 |
| 2026-05-25 12:00 |
00:28:02.17 |
+05:10:04.4 |
HIP 2165 |
14.12 |
| 2026-05-26 00:00 |
00:28:15.99 |
+05:11:49.6 |
HIP 2165 |
17.90 |
| 2026-05-26 12:00 |
00:28:29.73 |
+05:13:34.3 |
HIP 2165 |
21.68 |
| 2026-05-27 00:00 |
00:28:43.38 |
+05:15:18.5 |
HIP 2369 |
23.68 |
| 2026-05-27 12:00 |
00:28:56.94 |
+05:17:02.2 |
HIP 2369 |
19.98 |
| 2026-05-28 00:00 |
00:29:10.40 |
+05:18:45.3 |
HIP 2369 |
16.34 |
| 2026-05-28 12:00 |
00:29:23.78 |
+05:20:28.0 |
HIP 2369 |
12.80 |
| 2026-05-29 00:00 |
00:29:37.07 |
+05:22:10.0 |
HIP 2369 |
9.43 |
| 2026-05-29 12:00 |
00:29:50.27 |
+05:23:51.6 |
HIP 2369 |
6.50 |
| 2026-05-30 00:00 |
00:30:03.38 |
+05:25:32.6 |
HIP 2369 |
4.77 |
| 2026-05-30 12:00 |
00:30:16.39 |
+05:27:13.1 |
HIP 2369 |
5.49 |
| 2026-05-31 00:00 |
00:30:29.31 |
+05:28:53.0 |
HIP 2369 |
7.99 |
| 2026-05-31 12:00 |
00:30:42.14 |
+05:30:32.4 |
HIP 2369 |
11.11 |
| 2026-06-01 00:00 |
00:30:54.87 |
+05:32:11.3 |
HIP 2369 |
14.42 |
| 2026-06-01 12:00 |
00:31:07.51 |
+05:33:49.6 |
HIP 2369 |
17.81 |
| 2026-06-02 00:00 |
00:31:20.05 |
+05:35:27.3 |
HIP 2369 |
21.23 |