메타데이터
| 항목 |
값 |
| Designation |
C/2010 F4 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-04-06T02:32:51.809280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:42Z |
| Obs used |
81 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-03-30.0000000 |
| e |
1.00003647 |
| q (au) |
0.613826 |
| a (au) |
-16830.797200 |
| i (deg) |
89.145668 |
| Ω (om, deg) |
237.290555 |
| ω (w, deg) |
120.708831 |
| M (ma, deg) |
-0.000003 |
밝기
산란 + 전체 선형
$$
M_a = (15.310 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.310 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.804 |
| 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) |
| 2026-05-12 00:00 |
08:17:11.55 |
-75:39:06.4 |
HIP 40292 |
33.45 |
| 2026-05-12 12:00 |
08:17:16.17 |
-75:38:19.4 |
HIP 40292 |
34.28 |
| 2026-05-13 00:00 |
08:17:20.90 |
-75:37:32.4 |
HIP 40292 |
35.12 |
| 2026-05-13 12:00 |
08:17:25.72 |
-75:36:45.6 |
HIP 40292 |
35.95 |
| 2026-05-14 00:00 |
08:17:30.64 |
-75:35:59.0 |
HIP 40725 |
35.41 |
| 2026-05-14 12:00 |
08:17:35.65 |
-75:35:12.4 |
HIP 40725 |
34.60 |
| 2026-05-15 00:00 |
08:17:40.76 |
-75:34:26.1 |
HIP 40725 |
33.80 |
| 2026-05-15 12:00 |
08:17:45.96 |
-75:33:39.8 |
HIP 40725 |
32.99 |
| 2026-05-16 00:00 |
08:17:51.26 |
-75:32:53.7 |
HIP 40725 |
32.19 |
| 2026-05-16 12:00 |
08:17:56.65 |
-75:32:07.8 |
HIP 40725 |
31.40 |
| 2026-05-17 00:00 |
08:18:02.13 |
-75:31:22.0 |
HIP 40725 |
30.60 |
| 2026-05-17 12:00 |
08:18:07.71 |
-75:30:36.4 |
HIP 40725 |
29.82 |
| 2026-05-18 00:00 |
08:18:13.38 |
-75:29:51.0 |
HIP 40725 |
29.04 |
| 2026-05-18 12:00 |
08:18:19.13 |
-75:29:05.7 |
HIP 40725 |
28.26 |
| 2026-05-19 00:00 |
08:18:24.98 |
-75:28:20.6 |
HIP 40725 |
27.49 |
| 2026-05-19 12:00 |
08:18:30.92 |
-75:27:35.6 |
HIP 40725 |
26.73 |
| 2026-05-20 00:00 |
08:18:36.95 |
-75:26:50.9 |
HIP 40725 |
25.97 |
| 2026-05-20 12:00 |
08:18:43.06 |
-75:26:06.3 |
HIP 40725 |
25.22 |
| 2026-05-21 00:00 |
08:18:49.26 |
-75:25:21.9 |
HIP 40725 |
24.48 |
| 2026-05-21 12:00 |
08:18:55.55 |
-75:24:37.7 |
HIP 40725 |
23.76 |
| 2026-05-22 00:00 |
08:19:01.93 |
-75:23:53.6 |
HIP 40725 |
23.04 |
| 2026-05-22 12:00 |
08:19:08.39 |
-75:23:09.8 |
HIP 40725 |
22.33 |
| 2026-05-23 00:00 |
08:19:14.93 |
-75:22:26.1 |
HIP 40725 |
21.64 |
| 2026-05-23 12:00 |
08:19:21.56 |
-75:21:42.7 |
HIP 40725 |
20.96 |
| 2026-05-24 00:00 |
08:19:28.27 |
-75:20:59.4 |
HIP 40725 |
20.30 |
| 2026-05-24 12:00 |
08:19:35.07 |
-75:20:16.4 |
HIP 40725 |
19.66 |
| 2026-05-25 00:00 |
08:19:41.94 |
-75:19:33.5 |
HIP 40725 |
19.03 |
| 2026-05-25 12:00 |
08:19:48.90 |
-75:18:50.8 |
HIP 40725 |
18.43 |
| 2026-05-26 00:00 |
08:19:55.94 |
-75:18:08.4 |
HIP 40725 |
17.85 |
| 2026-05-26 12:00 |
08:20:03.06 |
-75:17:26.2 |
HIP 40725 |
17.30 |
| 2026-05-27 00:00 |
08:20:10.25 |
-75:16:44.1 |
HIP 40725 |
16.78 |
| 2026-05-27 12:00 |
08:20:17.53 |
-75:16:02.3 |
HIP 40725 |
16.29 |
| 2026-05-28 00:00 |
08:20:24.88 |
-75:15:20.7 |
HIP 40725 |
15.83 |
| 2026-05-28 12:00 |
08:20:32.32 |
-75:14:39.3 |
HIP 40725 |
15.41 |
| 2026-05-29 00:00 |
08:20:39.82 |
-75:13:58.2 |
HIP 40725 |
15.04 |
| 2026-05-29 12:00 |
08:20:47.41 |
-75:13:17.2 |
HIP 40725 |
14.70 |
| 2026-05-30 00:00 |
08:20:55.07 |
-75:12:36.5 |
HIP 40725 |
14.42 |
| 2026-05-30 12:00 |
08:21:02.80 |
-75:11:56.1 |
HIP 40725 |
14.18 |
| 2026-05-31 00:00 |
08:21:10.61 |
-75:11:15.8 |
HIP 40725 |
14.00 |
| 2026-05-31 12:00 |
08:21:18.49 |
-75:10:35.8 |
HIP 40725 |
13.87 |
| 2026-06-01 00:00 |
08:21:26.45 |
-75:09:56.0 |
HIP 40725 |
13.80 |
| 2026-06-01 12:00 |
08:21:34.48 |
-75:09:16.4 |
HIP 40725 |
13.79 |
| 2026-06-02 00:00 |
08:21:42.57 |
-75:08:37.1 |
HIP 40725 |
13.83 |