메타데이터
| 항목 |
값 |
| Designation |
C/1990 M1 (McNaught-Hughes) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1991-02-27T15:48:11.756160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:38Z |
| Obs used |
49 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
6.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1990-12-12.0000000 |
| e |
1.00128966 |
| q (au) |
2.682264 |
| a (au) |
-2079.821712 |
| i (deg) |
132.774960 |
| Ω (om, deg) |
233.206314 |
| ω (w, deg) |
18.169676 |
| M (ma, deg) |
-0.000807 |
밝기
산란 + 전체 선형
$$
M_a = (4.670 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.670 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
03:38:28.19 |
+24:27:14.5 |
HIP 16996 |
9.03 |
| 2026-06-01 12:00 |
03:38:30.21 |
+24:27:20.7 |
HIP 16996 |
8.85 |
| 2026-06-02 00:00 |
03:38:32.22 |
+24:27:26.9 |
HIP 16996 |
8.69 |
| 2026-06-02 12:00 |
03:38:34.22 |
+24:27:33.1 |
HIP 17020 |
8.40 |
| 2026-06-03 00:00 |
03:38:36.22 |
+24:27:39.2 |
HIP 17020 |
8.05 |
| 2026-06-03 12:00 |
03:38:38.22 |
+24:27:45.4 |
HIP 17020 |
7.71 |
| 2026-06-04 00:00 |
03:38:40.21 |
+24:27:51.6 |
HIP 17020 |
7.38 |
| 2026-06-04 12:00 |
03:38:42.20 |
+24:27:57.8 |
HIP 17020 |
7.07 |
| 2026-06-05 00:00 |
03:38:44.18 |
+24:28:04.0 |
HIP 17044 |
6.66 |
| 2026-06-05 12:00 |
03:38:46.16 |
+24:28:10.2 |
HIP 17044 |
6.21 |
| 2026-06-06 00:00 |
03:38:48.13 |
+24:28:16.4 |
HIP 17044 |
5.77 |
| 2026-06-06 12:00 |
03:38:50.10 |
+24:28:22.6 |
HIP 17044 |
5.33 |
| 2026-06-07 00:00 |
03:38:52.06 |
+24:28:28.8 |
HIP 17044 |
4.89 |
| 2026-06-07 12:00 |
03:38:54.02 |
+24:28:35.0 |
HIP 17044 |
4.46 |
| 2026-06-08 00:00 |
03:38:55.97 |
+24:28:41.3 |
HIP 17044 |
4.04 |
| 2026-06-08 12:00 |
03:38:57.91 |
+24:28:47.5 |
HIP 17044 |
3.63 |
| 2026-06-09 00:00 |
03:38:59.85 |
+24:28:53.7 |
HIP 17044 |
3.22 |
| 2026-06-09 12:00 |
03:39:01.78 |
+24:28:59.9 |
HIP 17044 |
2.84 |
| 2026-06-10 00:00 |
03:39:03.71 |
+24:29:06.1 |
HIP 17044 |
2.48 |
| 2026-06-10 12:00 |
03:39:05.63 |
+24:29:12.3 |
HIP 17044 |
2.15 |
| 2026-06-11 00:00 |
03:39:07.54 |
+24:29:18.5 |
HIP 17044 |
1.88 |
| 2026-06-11 12:00 |
03:39:09.44 |
+24:29:24.7 |
HIP 17044 |
1.68 |
| 2026-06-12 00:00 |
03:39:11.34 |
+24:29:30.9 |
HIP 17044 |
1.59 |
| 2026-06-12 12:00 |
03:39:13.24 |
+24:29:37.1 |
HIP 17044 |
1.62 |
| 2026-06-13 00:00 |
03:39:15.12 |
+24:29:43.3 |
HIP 17044 |
1.76 |
| 2026-06-13 12:00 |
03:39:17.00 |
+24:29:49.5 |
HIP 17044 |
2.00 |
| 2026-06-14 00:00 |
03:39:18.87 |
+24:29:55.6 |
HIP 17044 |
2.29 |
| 2026-06-14 12:00 |
03:39:20.73 |
+24:30:01.8 |
HIP 17044 |
2.62 |
| 2026-06-15 00:00 |
03:39:22.59 |
+24:30:08.0 |
HIP 17044 |
2.98 |
| 2026-06-15 12:00 |
03:39:24.44 |
+24:30:14.1 |
HIP 17044 |
3.35 |
| 2026-06-16 00:00 |
03:39:26.28 |
+24:30:20.3 |
HIP 17044 |
3.74 |
| 2026-06-16 12:00 |
03:39:28.11 |
+24:30:26.4 |
HIP 17044 |
4.13 |
| 2026-06-17 00:00 |
03:39:29.93 |
+24:30:32.6 |
HIP 17044 |
4.53 |
| 2026-06-17 12:00 |
03:39:31.75 |
+24:30:38.7 |
HIP 17044 |
4.93 |
| 2026-06-18 00:00 |
03:39:33.55 |
+24:30:44.8 |
HIP 17044 |
5.33 |
| 2026-06-18 12:00 |
03:39:35.35 |
+24:30:50.9 |
HIP 17044 |
5.74 |
| 2026-06-19 00:00 |
03:39:37.14 |
+24:30:57.0 |
HIP 17044 |
6.14 |
| 2026-06-19 12:00 |
03:39:38.92 |
+24:31:03.1 |
HIP 17044 |
6.55 |
| 2026-06-20 00:00 |
03:39:40.69 |
+24:31:09.1 |
HIP 17044 |
6.95 |
| 2026-06-20 12:00 |
03:39:42.45 |
+24:31:15.2 |
HIP 17044 |
7.35 |
| 2026-06-21 00:00 |
03:39:44.20 |
+24:31:21.2 |
HIP 17044 |
7.76 |
| 2026-06-21 12:00 |
03:39:45.95 |
+24:31:27.3 |
HIP 17044 |
8.16 |
| 2026-06-22 00:00 |
03:39:47.68 |
+24:31:33.3 |
HIP 17044 |
8.56 |