메타데이터
| 항목 |
값 |
| Designation |
C/2020 H7 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-06-03T12:09:27.060480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:06Z |
| Obs used |
174 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-04-29T10:09:34.848000Z |
| Discovery magnitude (MPC) |
20.60 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-05-21.0000000 |
| e |
0.99942724 |
| q (au) |
4.420107 |
| a (au) |
7717.249417 |
| i (deg) |
135.922901 |
| Ω (om, deg) |
323.529129 |
| ω (w, deg) |
82.769160 |
| M (ma, deg) |
359.999980 |
밝기
산란 + 전체 선형
$$
M_a = (11.096 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.096 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.784 |
| k |
0.800 |
| δ90 |
9.996 |
| 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 |
08:35:54.51 |
+06:12:57.9 |
HIP 42172 |
24.28 |
| 2026-07-29 12:00 |
08:36:00.13 |
+06:12:22.5 |
HIP 42283 |
23.00 |
| 2026-07-30 00:00 |
08:36:05.74 |
+06:11:46.9 |
HIP 42283 |
21.51 |
| 2026-07-30 12:00 |
08:36:11.36 |
+06:11:11.2 |
HIP 42283 |
20.03 |
| 2026-07-31 00:00 |
08:36:16.97 |
+06:10:35.3 |
HIP 42283 |
18.55 |
| 2026-07-31 12:00 |
08:36:22.58 |
+06:09:59.2 |
HIP 42283 |
17.07 |
| 2026-08-01 00:00 |
08:36:28.18 |
+06:09:22.9 |
HIP 42283 |
15.61 |
| 2026-08-01 12:00 |
08:36:33.79 |
+06:08:46.4 |
HIP 42283 |
14.15 |
| 2026-08-02 00:00 |
08:36:39.38 |
+06:08:09.8 |
HIP 42283 |
12.71 |
| 2026-08-02 12:00 |
08:36:44.98 |
+06:07:33.0 |
HIP 42283 |
11.29 |
| 2026-08-03 00:00 |
08:36:50.57 |
+06:06:56.0 |
HIP 42283 |
9.89 |
| 2026-08-03 12:00 |
08:36:56.15 |
+06:06:18.8 |
HIP 42283 |
8.54 |
| 2026-08-04 00:00 |
08:37:01.73 |
+06:05:41.5 |
HIP 42283 |
7.25 |
| 2026-08-04 12:00 |
08:37:07.30 |
+06:05:04.0 |
HIP 42283 |
6.06 |
| 2026-08-05 00:00 |
08:37:12.87 |
+06:04:26.4 |
HIP 42283 |
5.05 |
| 2026-08-05 12:00 |
08:37:18.43 |
+06:03:48.6 |
HIP 42283 |
4.35 |
| 2026-08-06 00:00 |
08:37:23.98 |
+06:03:10.6 |
HIP 42283 |
4.12 |
| 2026-08-06 12:00 |
08:37:29.52 |
+06:02:32.4 |
HIP 42283 |
4.42 |
| 2026-08-07 00:00 |
08:37:35.06 |
+06:01:54.1 |
HIP 42283 |
5.17 |
| 2026-08-07 12:00 |
08:37:40.59 |
+06:01:15.6 |
HIP 42283 |
6.20 |
| 2026-08-08 00:00 |
08:37:46.11 |
+06:00:37.0 |
HIP 42283 |
7.40 |
| 2026-08-08 12:00 |
08:37:51.62 |
+05:59:58.2 |
HIP 42283 |
8.69 |
| 2026-08-09 00:00 |
08:37:57.12 |
+05:59:19.3 |
HIP 42283 |
10.05 |
| 2026-08-09 12:00 |
08:38:02.61 |
+05:58:40.2 |
HIP 42283 |
11.44 |
| 2026-08-10 00:00 |
08:38:08.09 |
+05:58:00.9 |
HIP 42283 |
12.86 |
| 2026-08-10 12:00 |
08:38:13.56 |
+05:57:21.5 |
HIP 42283 |
14.29 |
| 2026-08-11 00:00 |
08:38:19.02 |
+05:56:42.0 |
HIP 42283 |
15.74 |
| 2026-08-11 12:00 |
08:38:24.46 |
+05:56:02.3 |
HIP 42283 |
17.19 |
| 2026-08-12 00:00 |
08:38:29.89 |
+05:55:22.5 |
HIP 42313 |
18.18 |
| 2026-08-12 12:00 |
08:38:35.32 |
+05:54:42.5 |
HIP 42313 |
18.68 |
| 2026-08-13 00:00 |
08:38:40.72 |
+05:54:02.4 |
HIP 42488 |
17.65 |
| 2026-08-13 12:00 |
08:38:46.12 |
+05:53:22.1 |
HIP 42488 |
16.15 |
| 2026-08-14 00:00 |
08:38:51.50 |
+05:52:41.7 |
HIP 42488 |
14.65 |
| 2026-08-14 12:00 |
08:38:56.86 |
+05:52:01.2 |
HIP 42488 |
13.16 |
| 2026-08-15 00:00 |
08:39:02.21 |
+05:51:20.5 |
HIP 42488 |
11.67 |
| 2026-08-15 12:00 |
08:39:07.54 |
+05:50:39.7 |
HIP 42488 |
10.17 |
| 2026-08-16 00:00 |
08:39:12.86 |
+05:49:58.8 |
HIP 42488 |
8.69 |
| 2026-08-16 12:00 |
08:39:18.17 |
+05:49:17.7 |
HIP 42488 |
7.20 |
| 2026-08-17 00:00 |
08:39:23.45 |
+05:48:36.5 |
HIP 42488 |
5.72 |
| 2026-08-17 12:00 |
08:39:28.72 |
+05:47:55.2 |
HIP 42488 |
4.24 |
| 2026-08-18 00:00 |
08:39:33.97 |
+05:47:13.8 |
HIP 42488 |
2.76 |
| 2026-08-18 12:00 |
08:39:39.20 |
+05:46:32.3 |
HIP 42488 |
1.29 |
| 2026-08-19 00:00 |
08:39:44.42 |
+05:45:50.6 |
HIP 42488 |
0.19 |