메타데이터
| 항목 |
값 |
| Designation |
C/2019 G4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-09-16T16:19:43.942080Z |
| Orbit solution date (soln_date, UTC) |
2023-04-24T19:06:38Z |
| Obs used |
7 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-01-04.0000000 |
| e |
1.00013440 |
| q (au) |
5.864733 |
| a (au) |
-43634.843792 |
| i (deg) |
138.390694 |
| Ω (om, deg) |
130.459931 |
| ω (w, deg) |
287.998779 |
| M (ma, deg) |
0.000051 |
밝기
산란 + 전체 선형
$$
M_a = (4.578 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.578 |
| n |
6.000 |
| gf |
0.861 |
| gb |
-0.985 |
| k |
1.000 |
| δ90 |
3.282 |
| 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 |
06:58:51.70 |
+46:16:08.6 |
HIP 33377 |
24.13 |
| 2026-07-29 12:00 |
06:58:58.53 |
+46:16:27.1 |
HIP 33377 |
25.31 |
| 2026-07-30 00:00 |
06:59:05.32 |
+46:16:45.9 |
HIP 33377 |
26.48 |
| 2026-07-30 12:00 |
06:59:12.09 |
+46:17:05.0 |
HIP 33377 |
27.66 |
| 2026-07-31 00:00 |
06:59:18.83 |
+46:17:24.3 |
HIP 33377 |
28.83 |
| 2026-07-31 12:00 |
06:59:25.55 |
+46:17:44.0 |
HIP 33377 |
30.00 |
| 2026-08-01 00:00 |
06:59:32.24 |
+46:18:04.0 |
HIP 33377 |
31.17 |
| 2026-08-01 12:00 |
06:59:38.89 |
+46:18:24.2 |
HIP 33377 |
32.34 |
| 2026-08-02 00:00 |
06:59:45.52 |
+46:18:44.8 |
HIP 33377 |
33.50 |
| 2026-08-02 12:00 |
06:59:52.12 |
+46:19:05.6 |
HIP 33377 |
34.66 |
| 2026-08-03 00:00 |
06:59:58.69 |
+46:19:26.7 |
HIP 33377 |
35.82 |
| 2026-08-03 12:00 |
07:00:05.23 |
+46:19:48.2 |
HIP 33954 |
35.32 |
| 2026-08-04 00:00 |
07:00:11.74 |
+46:20:09.9 |
HIP 34001 |
34.48 |
| 2026-08-04 12:00 |
07:00:18.21 |
+46:20:31.9 |
HIP 34001 |
33.59 |
| 2026-08-05 00:00 |
07:00:24.66 |
+46:20:54.2 |
HIP 34001 |
32.72 |
| 2026-08-05 12:00 |
07:00:31.07 |
+46:21:16.8 |
HIP 34001 |
31.88 |
| 2026-08-06 00:00 |
07:00:37.45 |
+46:21:39.6 |
HIP 34001 |
31.07 |
| 2026-08-06 12:00 |
07:00:43.79 |
+46:22:02.8 |
HIP 34001 |
30.29 |
| 2026-08-07 00:00 |
07:00:50.11 |
+46:22:26.3 |
HIP 34001 |
29.54 |
| 2026-08-07 12:00 |
07:00:56.38 |
+46:22:50.0 |
HIP 34001 |
28.83 |
| 2026-08-08 00:00 |
07:01:02.62 |
+46:23:14.1 |
HIP 34001 |
28.15 |
| 2026-08-08 12:00 |
07:01:08.83 |
+46:23:38.4 |
HIP 34001 |
27.51 |
| 2026-08-09 00:00 |
07:01:15.00 |
+46:24:03.0 |
HIP 34001 |
26.92 |
| 2026-08-09 12:00 |
07:01:21.13 |
+46:24:28.0 |
HIP 34001 |
26.37 |
| 2026-08-10 00:00 |
07:01:27.23 |
+46:24:53.2 |
HIP 34001 |
25.87 |
| 2026-08-10 12:00 |
07:01:33.28 |
+46:25:18.7 |
HIP 34001 |
25.41 |
| 2026-08-11 00:00 |
07:01:39.30 |
+46:25:44.5 |
HIP 34001 |
25.01 |
| 2026-08-11 12:00 |
07:01:45.29 |
+46:26:10.6 |
HIP 34001 |
24.66 |
| 2026-08-12 00:00 |
07:01:51.23 |
+46:26:37.0 |
HIP 34001 |
24.36 |
| 2026-08-12 12:00 |
07:01:57.13 |
+46:27:03.7 |
HIP 34001 |
24.13 |
| 2026-08-13 00:00 |
07:02:02.99 |
+46:27:30.7 |
HIP 34001 |
23.94 |
| 2026-08-13 12:00 |
07:02:08.81 |
+46:27:57.9 |
HIP 34001 |
23.82 |
| 2026-08-14 00:00 |
07:02:14.59 |
+46:28:25.5 |
HIP 34001 |
23.76 |
| 2026-08-14 12:00 |
07:02:20.32 |
+46:28:53.3 |
HIP 34001 |
23.75 |
| 2026-08-15 00:00 |
07:02:26.02 |
+46:29:21.5 |
HIP 34001 |
23.80 |
| 2026-08-15 12:00 |
07:02:31.67 |
+46:29:49.9 |
HIP 34001 |
23.91 |
| 2026-08-16 00:00 |
07:02:37.27 |
+46:30:18.6 |
HIP 34001 |
24.07 |
| 2026-08-16 12:00 |
07:02:42.84 |
+46:30:47.7 |
HIP 34001 |
24.29 |
| 2026-08-17 00:00 |
07:02:48.36 |
+46:31:17.0 |
HIP 34001 |
24.56 |
| 2026-08-17 12:00 |
07:02:53.83 |
+46:31:46.6 |
HIP 34001 |
24.87 |
| 2026-08-18 00:00 |
07:02:59.26 |
+46:32:16.4 |
HIP 34001 |
25.24 |
| 2026-08-18 12:00 |
07:03:04.64 |
+46:32:46.6 |
HIP 34001 |
25.64 |
| 2026-08-19 00:00 |
07:03:09.97 |
+46:33:17.1 |
HIP 34206 |
25.75 |