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) |
| 2026-09-20 00:00 |
09:02:01.34 |
-74:58:08.1 |
HIP 44473 |
12.84 |
| 2026-09-20 12:00 |
09:02:10.27 |
-74:58:43.1 |
HIP 44473 |
12.05 |
| 2026-09-21 00:00 |
09:02:19.15 |
-74:59:18.3 |
HIP 44473 |
11.26 |
| 2026-09-21 12:00 |
09:02:27.96 |
-74:59:53.8 |
HIP 44473 |
10.47 |
| 2026-09-22 00:00 |
09:02:36.71 |
-75:00:29.6 |
HIP 44473 |
9.69 |
| 2026-09-22 12:00 |
09:02:45.39 |
-75:01:05.6 |
HIP 44473 |
8.91 |
| 2026-09-23 00:00 |
09:02:54.01 |
-75:01:41.9 |
HIP 44473 |
8.14 |
| 2026-09-23 12:00 |
09:03:02.56 |
-75:02:18.5 |
HIP 44473 |
7.38 |
| 2026-09-24 00:00 |
09:03:11.04 |
-75:02:55.3 |
HIP 44473 |
6.62 |
| 2026-09-24 12:00 |
09:03:19.46 |
-75:03:32.4 |
HIP 44473 |
5.89 |
| 2026-09-25 00:00 |
09:03:27.81 |
-75:04:09.7 |
HIP 44473 |
5.17 |
| 2026-09-25 12:00 |
09:03:36.09 |
-75:04:47.3 |
HIP 44473 |
4.49 |
| 2026-09-26 00:00 |
09:03:44.30 |
-75:05:25.1 |
HIP 44473 |
3.86 |
| 2026-09-26 12:00 |
09:03:52.44 |
-75:06:03.2 |
HIP 44473 |
3.30 |
| 2026-09-27 00:00 |
09:04:00.52 |
-75:06:41.6 |
HIP 44473 |
2.88 |
| 2026-09-27 12:00 |
09:04:08.52 |
-75:07:20.2 |
HIP 44473 |
2.64 |
| 2026-09-28 00:00 |
09:04:16.45 |
-75:07:59.0 |
HIP 44473 |
2.64 |
| 2026-09-28 12:00 |
09:04:24.31 |
-75:08:38.1 |
HIP 44473 |
2.87 |
| 2026-09-29 00:00 |
09:04:32.10 |
-75:09:17.4 |
HIP 44473 |
3.30 |
| 2026-09-29 12:00 |
09:04:39.82 |
-75:09:57.0 |
HIP 44473 |
3.86 |
| 2026-09-30 00:00 |
09:04:47.46 |
-75:10:36.8 |
HIP 44473 |
4.49 |
| 2026-09-30 12:00 |
09:04:55.03 |
-75:11:16.9 |
HIP 44473 |
5.17 |
| 2026-10-01 00:00 |
09:05:02.52 |
-75:11:57.1 |
HIP 44473 |
5.89 |
| 2026-10-01 12:00 |
09:05:09.94 |
-75:12:37.6 |
HIP 44473 |
6.63 |
| 2026-10-02 00:00 |
09:05:17.28 |
-75:13:18.4 |
HIP 44473 |
7.38 |
| 2026-10-02 12:00 |
09:05:24.55 |
-75:13:59.3 |
HIP 44473 |
8.15 |
| 2026-10-03 00:00 |
09:05:31.74 |
-75:14:40.5 |
HIP 44473 |
8.93 |
| 2026-10-03 12:00 |
09:05:38.85 |
-75:15:21.9 |
HIP 44473 |
9.71 |
| 2026-10-04 00:00 |
09:05:45.89 |
-75:16:03.5 |
HIP 44473 |
10.49 |
| 2026-10-04 12:00 |
09:05:52.84 |
-75:16:45.4 |
HIP 44473 |
11.28 |
| 2026-10-05 00:00 |
09:05:59.72 |
-75:17:27.5 |
HIP 44473 |
12.08 |
| 2026-10-05 12:00 |
09:06:06.51 |
-75:18:09.7 |
HIP 44473 |
12.87 |
| 2026-10-06 00:00 |
09:06:13.23 |
-75:18:52.2 |
HIP 44473 |
13.67 |
| 2026-10-06 12:00 |
09:06:19.86 |
-75:19:34.9 |
HIP 44473 |
14.47 |
| 2026-10-07 00:00 |
09:06:26.41 |
-75:20:17.8 |
HIP 44473 |
15.27 |
| 2026-10-07 12:00 |
09:06:32.88 |
-75:21:00.9 |
HIP 44473 |
16.07 |
| 2026-10-08 00:00 |
09:06:39.26 |
-75:21:44.2 |
HIP 44473 |
16.87 |
| 2026-10-08 12:00 |
09:06:45.56 |
-75:22:27.7 |
HIP 44473 |
17.68 |
| 2026-10-09 00:00 |
09:06:51.77 |
-75:23:11.4 |
HIP 44473 |
18.48 |
| 2026-10-09 12:00 |
09:06:57.90 |
-75:23:55.3 |
HIP 44473 |
19.29 |
| 2026-10-10 00:00 |
09:07:03.95 |
-75:24:39.4 |
HIP 44473 |
20.09 |
| 2026-10-10 12:00 |
09:07:09.90 |
-75:25:23.6 |
HIP 44473 |
20.90 |
| 2026-10-11 00:00 |
09:07:15.77 |
-75:26:08.1 |
HIP 44473 |
21.70 |