메타데이터
| 항목 |
값 |
| Designation |
C/2020 H2 (Pruyne) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-04-27T14:08:36.116160Z |
| Orbit solution date (soln_date, UTC) |
2025-01-10T09:12:14Z |
| Obs used |
121 |
| NEO |
- |
| M1 |
18.900 |
| K1 |
22.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-05-25.0000000 |
| e |
0.99553868 |
| q (au) |
0.833616 |
| a (au) |
186.853978 |
| i (deg) |
125.044340 |
| Ω (om, deg) |
277.635070 |
| ω (w, deg) |
26.692025 |
| M (ma, deg) |
0.010577 |
밝기
산란 + 전체 선형
$$
M_a = (17.971 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.971 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-1.000 |
| k |
0.893 |
| 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) |
| 2026-09-20 00:00 |
06:39:25.32 |
+20:56:48.4 |
HIP 31987 |
29.17 |
| 2026-09-20 12:00 |
06:39:26.22 |
+20:56:38.4 |
HIP 31987 |
28.90 |
| 2026-09-21 00:00 |
06:39:27.07 |
+20:56:28.5 |
HIP 31987 |
28.64 |
| 2026-09-21 12:00 |
06:39:27.86 |
+20:56:18.7 |
HIP 31987 |
28.40 |
| 2026-09-22 00:00 |
06:39:28.59 |
+20:56:08.9 |
HIP 31987 |
28.16 |
| 2026-09-22 12:00 |
06:39:29.27 |
+20:55:59.1 |
HIP 31987 |
27.94 |
| 2026-09-23 00:00 |
06:39:29.89 |
+20:55:49.4 |
HIP 31987 |
27.72 |
| 2026-09-23 12:00 |
06:39:30.45 |
+20:55:39.7 |
HIP 31987 |
27.52 |
| 2026-09-24 00:00 |
06:39:30.96 |
+20:55:30.1 |
HIP 31987 |
27.33 |
| 2026-09-24 12:00 |
06:39:31.41 |
+20:55:20.5 |
HIP 31987 |
27.15 |
| 2026-09-25 00:00 |
06:39:31.80 |
+20:55:10.9 |
HIP 31987 |
26.98 |
| 2026-09-25 12:00 |
06:39:32.13 |
+20:55:01.4 |
HIP 31987 |
26.82 |
| 2026-09-26 00:00 |
06:39:32.41 |
+20:54:52.0 |
HIP 31987 |
26.67 |
| 2026-09-26 12:00 |
06:39:32.63 |
+20:54:42.5 |
HIP 31987 |
26.54 |
| 2026-09-27 00:00 |
06:39:32.79 |
+20:54:33.2 |
HIP 31987 |
26.41 |
| 2026-09-27 12:00 |
06:39:32.89 |
+20:54:23.9 |
HIP 31987 |
26.30 |
| 2026-09-28 00:00 |
06:39:32.94 |
+20:54:14.6 |
HIP 31987 |
26.20 |
| 2026-09-28 12:00 |
06:39:32.92 |
+20:54:05.4 |
HIP 31987 |
26.11 |
| 2026-09-29 00:00 |
06:39:32.85 |
+20:53:56.2 |
HIP 31987 |
26.04 |
| 2026-09-29 12:00 |
06:39:32.72 |
+20:53:47.0 |
HIP 31987 |
25.97 |
| 2026-09-30 00:00 |
06:39:32.54 |
+20:53:38.0 |
HIP 31987 |
25.92 |
| 2026-09-30 12:00 |
06:39:32.29 |
+20:53:28.9 |
HIP 31987 |
25.88 |
| 2026-10-01 00:00 |
06:39:31.99 |
+20:53:19.9 |
HIP 31987 |
25.86 |
| 2026-10-01 12:00 |
06:39:31.62 |
+20:53:11.0 |
HIP 31987 |
25.84 |
| 2026-10-02 00:00 |
06:39:31.20 |
+20:53:02.1 |
HIP 31987 |
25.84 |
| 2026-10-02 12:00 |
06:39:30.72 |
+20:52:53.3 |
HIP 31987 |
25.85 |
| 2026-10-03 00:00 |
06:39:30.18 |
+20:52:44.5 |
HIP 31987 |
25.88 |
| 2026-10-03 12:00 |
06:39:29.58 |
+20:52:35.7 |
HIP 31987 |
25.92 |
| 2026-10-04 00:00 |
06:39:28.92 |
+20:52:27.0 |
HIP 31987 |
25.97 |
| 2026-10-04 12:00 |
06:39:28.20 |
+20:52:18.4 |
HIP 31987 |
26.04 |
| 2026-10-05 00:00 |
06:39:27.42 |
+20:52:09.8 |
HIP 31987 |
26.12 |
| 2026-10-05 12:00 |
06:39:26.59 |
+20:52:01.3 |
HIP 31987 |
26.22 |
| 2026-10-06 00:00 |
06:39:25.69 |
+20:51:52.8 |
HIP 31987 |
26.33 |
| 2026-10-06 12:00 |
06:39:24.73 |
+20:51:44.3 |
HIP 31987 |
26.45 |
| 2026-10-07 00:00 |
06:39:23.72 |
+20:51:36.0 |
HIP 31987 |
26.59 |
| 2026-10-07 12:00 |
06:39:22.64 |
+20:51:27.6 |
HIP 31987 |
26.75 |
| 2026-10-08 00:00 |
06:39:21.50 |
+20:51:19.4 |
HIP 31987 |
26.92 |
| 2026-10-08 12:00 |
06:39:20.31 |
+20:51:11.1 |
HIP 31987 |
27.10 |
| 2026-10-09 00:00 |
06:39:19.05 |
+20:51:03.0 |
HIP 31987 |
27.30 |
| 2026-10-09 12:00 |
06:39:17.73 |
+20:50:54.9 |
HIP 31987 |
27.52 |
| 2026-10-10 00:00 |
06:39:16.36 |
+20:50:46.8 |
HIP 31987 |
27.75 |
| 2026-10-10 12:00 |
06:39:14.92 |
+20:50:38.8 |
HIP 31987 |
27.99 |
| 2026-10-11 00:00 |
06:39:13.42 |
+20:50:30.9 |
HIP 31987 |
28.25 |