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) |
| 2026-05-12 00:00 |
21:40:56.38 |
+57:34:27.9 |
HIP 106937 |
13.13 |
| 2026-05-12 12:00 |
21:40:57.16 |
+57:36:03.6 |
HIP 106937 |
13.95 |
| 2026-05-13 00:00 |
21:40:57.80 |
+57:37:39.1 |
HIP 107164 |
13.26 |
| 2026-05-13 12:00 |
21:40:58.30 |
+57:39:14.6 |
HIP 107164 |
12.49 |
| 2026-05-14 00:00 |
21:40:58.66 |
+57:40:49.9 |
HIP 107164 |
11.90 |
| 2026-05-14 12:00 |
21:40:58.89 |
+57:42:25.2 |
HIP 107164 |
11.52 |
| 2026-05-15 00:00 |
21:40:58.97 |
+57:44:00.3 |
HIP 107164 |
11.37 |
| 2026-05-15 12:00 |
21:40:58.91 |
+57:45:35.2 |
HIP 107164 |
11.47 |
| 2026-05-16 00:00 |
21:40:58.71 |
+57:47:10.1 |
HIP 107164 |
11.79 |
| 2026-05-16 12:00 |
21:40:58.38 |
+57:48:44.7 |
HIP 107164 |
12.32 |
| 2026-05-17 00:00 |
21:40:57.90 |
+57:50:19.2 |
HIP 107164 |
13.04 |
| 2026-05-17 12:00 |
21:40:57.28 |
+57:51:53.6 |
HIP 107164 |
13.92 |
| 2026-05-18 00:00 |
21:40:56.51 |
+57:53:27.7 |
HIP 106919 |
14.65 |
| 2026-05-18 12:00 |
21:40:55.61 |
+57:55:01.6 |
HIP 106919 |
15.19 |
| 2026-05-19 00:00 |
21:40:54.56 |
+57:56:35.4 |
HIP 106919 |
15.84 |
| 2026-05-19 12:00 |
21:40:53.38 |
+57:58:08.9 |
HIP 106919 |
16.60 |
| 2026-05-20 00:00 |
21:40:52.05 |
+57:59:42.2 |
HIP 106919 |
17.45 |
| 2026-05-20 12:00 |
21:40:50.58 |
+58:01:15.2 |
HIP 106956 |
16.06 |
| 2026-05-21 00:00 |
21:40:48.96 |
+58:02:48.1 |
HIP 106956 |
14.66 |
| 2026-05-21 12:00 |
21:40:47.21 |
+58:04:20.6 |
HIP 106956 |
13.29 |
| 2026-05-22 00:00 |
21:40:45.31 |
+58:05:52.9 |
HIP 106956 |
11.95 |
| 2026-05-22 12:00 |
21:40:43.27 |
+58:07:24.9 |
HIP 106956 |
10.66 |
| 2026-05-23 00:00 |
21:40:41.09 |
+58:08:56.7 |
HIP 106956 |
9.45 |
| 2026-05-23 12:00 |
21:40:38.76 |
+58:10:28.1 |
HIP 106956 |
8.33 |
| 2026-05-24 00:00 |
21:40:36.29 |
+58:11:59.3 |
HIP 106956 |
7.36 |
| 2026-05-24 12:00 |
21:40:33.68 |
+58:13:30.1 |
HIP 106956 |
6.60 |
| 2026-05-25 00:00 |
21:40:30.93 |
+58:15:00.6 |
HIP 106956 |
6.12 |
| 2026-05-25 12:00 |
21:40:28.04 |
+58:16:30.8 |
HIP 106956 |
6.00 |
| 2026-05-26 00:00 |
21:40:25.00 |
+58:18:00.7 |
HIP 106956 |
6.26 |
| 2026-05-26 12:00 |
21:40:21.82 |
+58:19:30.2 |
HIP 106956 |
6.85 |
| 2026-05-27 00:00 |
21:40:18.50 |
+58:20:59.4 |
HIP 106956 |
7.69 |
| 2026-05-27 12:00 |
21:40:15.03 |
+58:22:28.2 |
HIP 106956 |
8.72 |
| 2026-05-28 00:00 |
21:40:11.43 |
+58:23:56.6 |
HIP 106956 |
9.87 |
| 2026-05-28 12:00 |
21:40:07.68 |
+58:25:24.7 |
HIP 106956 |
11.10 |
| 2026-05-29 00:00 |
21:40:03.79 |
+58:26:52.4 |
HIP 106956 |
12.40 |
| 2026-05-29 12:00 |
21:39:59.76 |
+58:28:19.7 |
HIP 106956 |
13.74 |
| 2026-05-30 00:00 |
21:39:55.58 |
+58:29:46.5 |
HIP 106956 |
15.11 |
| 2026-05-30 12:00 |
21:39:51.26 |
+58:31:13.0 |
HIP 106956 |
16.51 |
| 2026-05-31 00:00 |
21:39:46.81 |
+58:32:39.0 |
HIP 107123 |
17.40 |
| 2026-05-31 12:00 |
21:39:42.20 |
+58:34:04.6 |
HIP 107123 |
18.25 |
| 2026-06-01 00:00 |
21:39:37.46 |
+58:35:29.8 |
HIP 106770 |
18.39 |
| 2026-06-01 12:00 |
21:39:32.58 |
+58:36:54.5 |
HIP 106770 |
17.10 |
| 2026-06-02 00:00 |
21:39:27.55 |
+58:38:18.8 |
HIP 106770 |
15.85 |