메타데이터
| 항목 |
값 |
| Designation |
C/2012 C1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-02-04T12:32:23.248320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:00Z |
| Obs used |
219 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
11.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-05.0000000 |
| e |
0.99620583 |
| q (au) |
4.837975 |
| a (au) |
1275.108361 |
| i (deg) |
96.277709 |
| Ω (om, deg) |
300.639926 |
| ω (w, deg) |
279.889151 |
| M (ma, deg) |
359.998019 |
밝기
산란 + 전체 선형
$$
M_a = (2.681 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.681 |
| 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) |
| 2026-05-12 00:00 |
19:14:23.00 |
+28:57:06.7 |
HIP 94476 |
13.46 |
| 2026-05-12 12:00 |
19:14:20.10 |
+28:57:52.9 |
HIP 94476 |
13.62 |
| 2026-05-13 00:00 |
19:14:17.15 |
+28:58:38.8 |
HIP 94476 |
13.85 |
| 2026-05-13 12:00 |
19:14:14.17 |
+28:59:24.4 |
HIP 94476 |
14.14 |
| 2026-05-14 00:00 |
19:14:11.16 |
+29:00:09.8 |
HIP 94476 |
14.48 |
| 2026-05-14 12:00 |
19:14:08.11 |
+29:00:54.9 |
HIP 94476 |
14.88 |
| 2026-05-15 00:00 |
19:14:05.02 |
+29:01:39.6 |
HIP 94476 |
15.32 |
| 2026-05-15 12:00 |
19:14:01.90 |
+29:02:24.1 |
HIP 94476 |
15.81 |
| 2026-05-16 00:00 |
19:13:58.75 |
+29:03:08.3 |
HIP 94476 |
16.34 |
| 2026-05-16 12:00 |
19:13:55.56 |
+29:03:52.2 |
HIP 94412 |
16.41 |
| 2026-05-17 00:00 |
19:13:52.33 |
+29:04:35.9 |
HIP 94412 |
15.41 |
| 2026-05-17 12:00 |
19:13:49.08 |
+29:05:19.2 |
HIP 94412 |
14.40 |
| 2026-05-18 00:00 |
19:13:45.78 |
+29:06:02.2 |
HIP 94412 |
13.40 |
| 2026-05-18 12:00 |
19:13:42.46 |
+29:06:44.9 |
HIP 94412 |
12.39 |
| 2026-05-19 00:00 |
19:13:39.10 |
+29:07:27.3 |
HIP 94412 |
11.39 |
| 2026-05-19 12:00 |
19:13:35.71 |
+29:08:09.3 |
HIP 94412 |
10.38 |
| 2026-05-20 00:00 |
19:13:32.28 |
+29:08:51.1 |
HIP 94412 |
9.38 |
| 2026-05-20 12:00 |
19:13:28.82 |
+29:09:32.5 |
HIP 94412 |
8.37 |
| 2026-05-21 00:00 |
19:13:25.33 |
+29:10:13.6 |
HIP 94412 |
7.37 |
| 2026-05-21 12:00 |
19:13:21.81 |
+29:10:54.4 |
HIP 94412 |
6.36 |
| 2026-05-22 00:00 |
19:13:18.26 |
+29:11:34.9 |
HIP 94412 |
5.37 |
| 2026-05-22 12:00 |
19:13:14.67 |
+29:12:15.0 |
HIP 94412 |
4.38 |
| 2026-05-23 00:00 |
19:13:11.06 |
+29:12:54.8 |
HIP 94412 |
3.41 |
| 2026-05-23 12:00 |
19:13:07.41 |
+29:13:34.3 |
HIP 94412 |
2.50 |
| 2026-05-24 00:00 |
19:13:03.73 |
+29:14:13.4 |
HIP 94412 |
1.70 |
| 2026-05-24 12:00 |
19:13:00.03 |
+29:14:52.2 |
HIP 94412 |
1.30 |
| 2026-05-25 00:00 |
19:12:56.29 |
+29:15:30.6 |
HIP 94412 |
1.62 |
| 2026-05-25 12:00 |
19:12:52.52 |
+29:16:08.7 |
HIP 94412 |
2.38 |
| 2026-05-26 00:00 |
19:12:48.72 |
+29:16:46.5 |
HIP 94412 |
3.29 |
| 2026-05-26 12:00 |
19:12:44.90 |
+29:17:23.9 |
HIP 94412 |
4.27 |
| 2026-05-27 00:00 |
19:12:41.04 |
+29:18:00.9 |
HIP 94412 |
5.26 |
| 2026-05-27 12:00 |
19:12:37.16 |
+29:18:37.6 |
HIP 94412 |
6.28 |
| 2026-05-28 00:00 |
19:12:33.24 |
+29:19:14.0 |
HIP 94412 |
7.30 |
| 2026-05-28 12:00 |
19:12:29.30 |
+29:19:50.0 |
HIP 94412 |
8.33 |
| 2026-05-29 00:00 |
19:12:25.33 |
+29:20:25.6 |
HIP 94412 |
9.36 |
| 2026-05-29 12:00 |
19:12:21.34 |
+29:21:00.9 |
HIP 94412 |
10.39 |
| 2026-05-30 00:00 |
19:12:17.31 |
+29:21:35.8 |
HIP 94412 |
11.43 |
| 2026-05-30 12:00 |
19:12:13.26 |
+29:22:10.3 |
HIP 94412 |
12.47 |
| 2026-05-31 00:00 |
19:12:09.19 |
+29:22:44.5 |
HIP 94412 |
13.52 |
| 2026-05-31 12:00 |
19:12:05.08 |
+29:23:18.3 |
HIP 94412 |
14.56 |
| 2026-06-01 00:00 |
19:12:00.95 |
+29:23:51.7 |
HIP 94412 |
15.61 |
| 2026-06-01 12:00 |
19:11:56.80 |
+29:24:24.8 |
HIP 94251 |
16.45 |
| 2026-06-02 00:00 |
19:11:52.62 |
+29:24:57.5 |
HIP 94251 |
16.32 |