C/2021 G3 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
C/2021 G3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-10-18T17:46:41.067840Z |
| Orbit solution date (soln_date, UTC) |
2022-12-08T23:43:00Z |
| Obs used |
63 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
14.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-07-12.0000000 |
| e |
1.00119266 |
| q (au) |
5.181101 |
| a (au) |
-4344.158799 |
| i (deg) |
102.884132 |
| Ω (om, deg) |
147.418441 |
| ω (w, deg) |
10.663883 |
| M (ma, deg) |
-0.000340 |
밝기
산란 + 전체 선형
$$
M_a = (14.019 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.019 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.980 |
| 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) |
| 2026-02-03 00:00 |
21:04:41.63 |
+54:31:19.3 |
HIP 103955 |
13.28 |
| 2026-02-03 12:00 |
21:04:59.05 |
+54:30:57.5 |
HIP 103955 |
14.67 |
| 2026-02-04 00:00 |
21:05:16.44 |
+54:30:36.8 |
HIP 103955 |
16.35 |
| 2026-02-04 12:00 |
21:05:33.82 |
+54:30:17.2 |
HIP 103955 |
18.25 |
| 2026-02-05 00:00 |
21:05:51.17 |
+54:29:58.7 |
HIP 104193 |
18.13 |
| 2026-02-05 12:00 |
21:06:08.50 |
+54:29:41.2 |
HIP 104193 |
17.10 |
| 2026-02-06 00:00 |
21:06:25.81 |
+54:29:24.8 |
HIP 104193 |
16.42 |
| 2026-02-06 12:00 |
21:06:43.09 |
+54:29:09.5 |
HIP 104193 |
16.14 |
| 2026-02-07 00:00 |
21:07:00.34 |
+54:28:55.2 |
HIP 104193 |
16.26 |
| 2026-02-07 12:00 |
21:07:17.57 |
+54:28:42.0 |
HIP 104193 |
16.79 |
| 2026-02-08 00:00 |
21:07:34.78 |
+54:28:29.9 |
HIP 104426 |
16.09 |
| 2026-02-08 12:00 |
21:07:51.96 |
+54:28:18.8 |
HIP 104426 |
13.82 |
| 2026-02-09 00:00 |
21:08:09.11 |
+54:28:08.8 |
HIP 104426 |
11.65 |
| 2026-02-09 12:00 |
21:08:26.23 |
+54:27:59.9 |
HIP 104426 |
9.65 |
| 2026-02-10 00:00 |
21:08:43.32 |
+54:27:52.0 |
HIP 104426 |
7.97 |
| 2026-02-10 12:00 |
21:09:00.38 |
+54:27:45.1 |
HIP 104426 |
6.81 |
| 2026-02-11 00:00 |
21:09:17.41 |
+54:27:39.3 |
HIP 104426 |
6.47 |
| 2026-02-11 12:00 |
21:09:34.41 |
+54:27:34.6 |
HIP 104426 |
7.06 |
| 2026-02-12 00:00 |
21:09:51.38 |
+54:27:30.9 |
HIP 104426 |
8.38 |
| 2026-02-12 12:00 |
21:10:08.31 |
+54:27:28.2 |
HIP 104426 |
10.15 |
| 2026-02-13 00:00 |
21:10:25.21 |
+54:27:26.6 |
HIP 104426 |
12.17 |
| 2026-02-13 12:00 |
21:10:42.08 |
+54:27:26.0 |
HIP 104426 |
14.33 |
| 2026-02-14 00:00 |
21:10:58.91 |
+54:27:26.5 |
HIP 104426 |
16.57 |
| 2026-02-14 12:00 |
21:11:15.70 |
+54:27:27.9 |
HIP 104426 |
18.86 |
| 2026-02-15 00:00 |
21:11:32.46 |
+54:27:30.4 |
HIP 104426 |
21.19 |
| 2026-02-15 12:00 |
21:11:49.18 |
+54:27:33.9 |
HIP 104829 |
21.02 |
| 2026-02-16 00:00 |
21:12:05.86 |
+54:27:38.5 |
HIP 104829 |
18.60 |
| 2026-02-16 12:00 |
21:12:22.51 |
+54:27:44.0 |
HIP 104829 |
16.18 |
| 2026-02-17 00:00 |
21:12:39.11 |
+54:27:50.6 |
HIP 104829 |
13.77 |
| 2026-02-17 12:00 |
21:12:55.67 |
+54:27:58.2 |
HIP 104829 |
11.36 |
| 2026-02-18 00:00 |
21:13:12.19 |
+54:28:06.7 |
HIP 104829 |
8.95 |
| 2026-02-18 12:00 |
21:13:28.67 |
+54:28:16.3 |
HIP 104829 |
6.56 |
| 2026-02-19 00:00 |
21:13:45.11 |
+54:28:26.9 |
HIP 104829 |
4.16 |
| 2026-02-19 12:00 |
21:14:01.50 |
+54:28:38.5 |
HIP 104829 |
1.78 |
| 2026-02-20 00:00 |
21:14:17.84 |
+54:28:51.0 |
HIP 104829 |
0.62 |
| 2026-02-20 12:00 |
21:14:34.15 |
+54:29:04.5 |
HIP 104829 |
2.99 |
| 2026-02-21 00:00 |
21:14:50.40 |
+54:29:19.0 |
HIP 104829 |
5.36 |
| 2026-02-21 12:00 |
21:15:06.61 |
+54:29:34.5 |
HIP 104829 |
7.73 |
| 2026-02-22 00:00 |
21:15:22.77 |
+54:29:51.0 |
HIP 104829 |
10.09 |
| 2026-02-22 12:00 |
21:15:38.89 |
+54:30:08.4 |
HIP 104829 |
12.45 |
| 2026-02-23 00:00 |
21:15:54.95 |
+54:30:26.8 |
HIP 104829 |
14.80 |
| 2026-02-23 12:00 |
21:16:10.96 |
+54:30:46.1 |
HIP 104829 |
17.14 |
| 2026-02-24 00:00 |
21:16:26.93 |
+54:31:06.4 |
HIP 104829 |
19.48 |