메타데이터
| 항목 |
값 |
| Designation |
C/2007 Y2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-04-08T09:35:06.708480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:15Z |
| Obs used |
81 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-03-10.0000000 |
| e |
0.99652600 |
| q (au) |
4.208958 |
| a (au) |
1211.561103 |
| i (deg) |
98.503197 |
| Ω (om, deg) |
303.462012 |
| ω (w, deg) |
257.686731 |
| M (ma, deg) |
359.999313 |
밝기
산란 + 전체 선형
$$
M_a = (9.769 + 3.626\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.769 |
| n |
3.626 |
| gf |
0.997 |
| gb |
-1.000 |
| k |
0.998 |
| 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 |
19:34:25.45 |
+16:15:33.4 |
HIP 96254 |
1.65 |
| 2026-05-12 12:00 |
19:34:23.65 |
+16:16:01.7 |
HIP 96254 |
1.19 |
| 2026-05-13 00:00 |
19:34:21.83 |
+16:16:29.8 |
HIP 96254 |
0.96 |
| 2026-05-13 12:00 |
19:34:19.98 |
+16:16:57.7 |
HIP 96254 |
1.10 |
| 2026-05-14 00:00 |
19:34:18.11 |
+16:17:25.5 |
HIP 96254 |
1.53 |
| 2026-05-14 12:00 |
19:34:16.21 |
+16:17:53.1 |
HIP 96254 |
2.07 |
| 2026-05-15 00:00 |
19:34:14.28 |
+16:18:20.5 |
HIP 96254 |
2.66 |
| 2026-05-15 12:00 |
19:34:12.33 |
+16:18:47.7 |
HIP 96254 |
3.27 |
| 2026-05-16 00:00 |
19:34:10.35 |
+16:19:14.7 |
HIP 96254 |
3.90 |
| 2026-05-16 12:00 |
19:34:08.34 |
+16:19:41.6 |
HIP 96254 |
4.53 |
| 2026-05-17 00:00 |
19:34:06.31 |
+16:20:08.2 |
HIP 96254 |
5.18 |
| 2026-05-17 12:00 |
19:34:04.25 |
+16:20:34.7 |
HIP 96254 |
5.82 |
| 2026-05-18 00:00 |
19:34:02.17 |
+16:21:01.0 |
HIP 96254 |
6.47 |
| 2026-05-18 12:00 |
19:34:00.07 |
+16:21:27.0 |
HIP 96254 |
7.13 |
| 2026-05-19 00:00 |
19:33:57.94 |
+16:21:52.9 |
HIP 96254 |
7.79 |
| 2026-05-19 12:00 |
19:33:55.78 |
+16:22:18.6 |
HIP 96254 |
8.45 |
| 2026-05-20 00:00 |
19:33:53.60 |
+16:22:44.1 |
HIP 96254 |
9.11 |
| 2026-05-20 12:00 |
19:33:51.39 |
+16:23:09.4 |
HIP 96254 |
9.78 |
| 2026-05-21 00:00 |
19:33:49.16 |
+16:23:34.5 |
HIP 96254 |
10.45 |
| 2026-05-21 12:00 |
19:33:46.91 |
+16:23:59.3 |
HIP 96254 |
11.12 |
| 2026-05-22 00:00 |
19:33:44.63 |
+16:24:24.0 |
HIP 96254 |
11.79 |
| 2026-05-22 12:00 |
19:33:42.33 |
+16:24:48.5 |
HIP 96254 |
12.47 |
| 2026-05-23 00:00 |
19:33:40.01 |
+16:25:12.7 |
HIP 96254 |
13.15 |
| 2026-05-23 12:00 |
19:33:37.66 |
+16:25:36.8 |
HIP 96254 |
13.83 |
| 2026-05-24 00:00 |
19:33:35.29 |
+16:26:00.6 |
HIP 96254 |
14.51 |
| 2026-05-24 12:00 |
19:33:32.89 |
+16:26:24.3 |
HIP 96254 |
15.20 |
| 2026-05-25 00:00 |
19:33:30.48 |
+16:26:47.7 |
HIP 96254 |
15.89 |
| 2026-05-25 12:00 |
19:33:28.04 |
+16:27:10.9 |
HIP 96254 |
16.58 |
| 2026-05-26 00:00 |
19:33:25.58 |
+16:27:33.9 |
HIP 96254 |
17.28 |
| 2026-05-26 12:00 |
19:33:23.09 |
+16:27:56.6 |
HIP 96254 |
17.97 |
| 2026-05-27 00:00 |
19:33:20.59 |
+16:28:19.2 |
HIP 96078 |
18.33 |
| 2026-05-27 12:00 |
19:33:18.06 |
+16:28:41.5 |
HIP 96078 |
17.73 |
| 2026-05-28 00:00 |
19:33:15.51 |
+16:29:03.6 |
HIP 96078 |
17.12 |
| 2026-05-28 12:00 |
19:33:12.93 |
+16:29:25.5 |
HIP 96078 |
16.52 |
| 2026-05-29 00:00 |
19:33:10.34 |
+16:29:47.1 |
HIP 96078 |
15.93 |
| 2026-05-29 12:00 |
19:33:07.73 |
+16:30:08.5 |
HIP 96078 |
15.34 |
| 2026-05-30 00:00 |
19:33:05.09 |
+16:30:29.7 |
HIP 96078 |
14.76 |
| 2026-05-30 12:00 |
19:33:02.44 |
+16:30:50.7 |
HIP 96078 |
14.18 |
| 2026-05-31 00:00 |
19:32:59.76 |
+16:31:11.5 |
HIP 96078 |
13.61 |
| 2026-05-31 12:00 |
19:32:57.06 |
+16:31:32.0 |
HIP 96078 |
13.06 |
| 2026-06-01 00:00 |
19:32:54.34 |
+16:31:52.3 |
HIP 96078 |
12.51 |
| 2026-06-01 12:00 |
19:32:51.60 |
+16:32:12.3 |
HIP 96078 |
11.98 |
| 2026-06-02 00:00 |
19:32:48.85 |
+16:32:32.1 |
HIP 96078 |
11.47 |