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) |
| 2026-03-26 00:00 |
08:18:16.49 |
-76:54:26.3 |
HIP 40702 |
1.13 |
| 2026-03-26 12:00 |
08:18:10.15 |
-76:53:42.7 |
HIP 40702 |
1.91 |
| 2026-03-27 00:00 |
08:18:03.94 |
-76:52:58.8 |
HIP 40702 |
2.71 |
| 2026-03-27 12:00 |
08:17:57.85 |
-76:52:14.7 |
HIP 40702 |
3.51 |
| 2026-03-28 00:00 |
08:17:51.88 |
-76:51:30.4 |
HIP 40702 |
4.31 |
| 2026-03-28 12:00 |
08:17:46.04 |
-76:50:46.0 |
HIP 40702 |
5.12 |
| 2026-03-29 00:00 |
08:17:40.33 |
-76:50:01.3 |
HIP 40702 |
5.93 |
| 2026-03-29 12:00 |
08:17:34.74 |
-76:49:16.4 |
HIP 40702 |
6.74 |
| 2026-03-30 00:00 |
08:17:29.27 |
-76:48:31.3 |
HIP 40702 |
7.55 |
| 2026-03-30 12:00 |
08:17:23.93 |
-76:47:46.1 |
HIP 40702 |
8.36 |
| 2026-03-31 00:00 |
08:17:18.71 |
-76:47:00.6 |
HIP 40702 |
9.17 |
| 2026-03-31 12:00 |
08:17:13.62 |
-76:46:15.0 |
HIP 40702 |
9.98 |
| 2026-04-01 00:00 |
08:17:08.65 |
-76:45:29.2 |
HIP 40702 |
10.79 |
| 2026-04-01 12:00 |
08:17:03.81 |
-76:44:43.3 |
HIP 40702 |
11.60 |
| 2026-04-02 00:00 |
08:16:59.09 |
-76:43:57.2 |
HIP 40702 |
12.41 |
| 2026-04-02 12:00 |
08:16:54.50 |
-76:43:10.9 |
HIP 40702 |
13.22 |
| 2026-04-03 00:00 |
08:16:50.03 |
-76:42:24.4 |
HIP 40702 |
14.03 |
| 2026-04-03 12:00 |
08:16:45.69 |
-76:41:37.8 |
HIP 40702 |
14.85 |
| 2026-04-04 00:00 |
08:16:41.47 |
-76:40:51.1 |
HIP 40555 |
15.26 |
| 2026-04-04 12:00 |
08:16:37.38 |
-76:40:04.2 |
HIP 40555 |
14.49 |
| 2026-04-05 00:00 |
08:16:33.41 |
-76:39:17.1 |
HIP 40555 |
13.73 |
| 2026-04-05 12:00 |
08:16:29.57 |
-76:38:29.9 |
HIP 40555 |
12.96 |
| 2026-04-06 00:00 |
08:16:25.85 |
-76:37:42.6 |
HIP 40555 |
12.21 |
| 2026-04-06 12:00 |
08:16:22.26 |
-76:36:55.1 |
HIP 40555 |
11.45 |
| 2026-04-07 00:00 |
08:16:18.79 |
-76:36:07.5 |
HIP 40555 |
10.71 |
| 2026-04-07 12:00 |
08:16:15.44 |
-76:35:19.8 |
HIP 40555 |
9.97 |
| 2026-04-08 00:00 |
08:16:12.22 |
-76:34:32.0 |
HIP 40555 |
9.24 |
| 2026-04-08 12:00 |
08:16:09.13 |
-76:33:44.0 |
HIP 40555 |
8.52 |
| 2026-04-09 00:00 |
08:16:06.16 |
-76:32:56.0 |
HIP 40555 |
7.82 |
| 2026-04-09 12:00 |
08:16:03.31 |
-76:32:07.8 |
HIP 40555 |
7.14 |
| 2026-04-10 00:00 |
08:16:00.59 |
-76:31:19.5 |
HIP 40555 |
6.48 |
| 2026-04-10 12:00 |
08:15:57.99 |
-76:30:31.1 |
HIP 40555 |
5.87 |
| 2026-04-11 00:00 |
08:15:55.52 |
-76:29:42.7 |
HIP 40555 |
5.30 |
| 2026-04-11 12:00 |
08:15:53.17 |
-76:28:54.1 |
HIP 40555 |
4.80 |
| 2026-04-12 00:00 |
08:15:50.94 |
-76:28:05.4 |
HIP 40555 |
4.39 |
| 2026-04-12 12:00 |
08:15:48.84 |
-76:27:16.6 |
HIP 40555 |
4.10 |
| 2026-04-13 00:00 |
08:15:46.86 |
-76:26:27.8 |
HIP 40555 |
3.96 |
| 2026-04-13 12:00 |
08:15:45.01 |
-76:25:38.9 |
HIP 40555 |
3.98 |
| 2026-04-14 00:00 |
08:15:43.27 |
-76:24:49.9 |
HIP 40555 |
4.15 |
| 2026-04-14 12:00 |
08:15:41.66 |
-76:24:00.8 |
HIP 40555 |
4.47 |
| 2026-04-15 00:00 |
08:15:40.18 |
-76:23:11.7 |
HIP 40555 |
4.90 |
| 2026-04-15 12:00 |
08:15:38.81 |
-76:22:22.5 |
HIP 40555 |
5.42 |
| 2026-04-16 00:00 |
08:15:37.57 |
-76:21:33.3 |
HIP 40555 |
6.00 |