메타데이터
| 항목 |
값 |
| Designation |
C/2008 Q1 (Maticic) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-12-30T03:12:23.523840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:22Z |
| Obs used |
1021 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-01-09.0000000 |
| e |
0.99501685 |
| q (au) |
2.959144 |
| a (au) |
593.829979 |
| i (deg) |
118.626625 |
| Ω (om, deg) |
9.307702 |
| ω (w, deg) |
104.480851 |
| M (ma, deg) |
0.000672 |
밝기
산란 + 전체 선형
$$
M_a = (12.548 + 4.150\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.548 |
| n |
4.150 |
| gf |
1.000 |
| gb |
-0.820 |
| k |
0.800 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2009-01-12 |
2009-08-14 |
-13.1930 |
+6.500 |
| 2009-08-14 |
2010-04-10 |
+9.2086 |
-6.432 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
07:51:29.80 |
-36:28:35.0 |
HIP 38268 |
19.05 |
| 2026-05-12 12:00 |
07:51:31.24 |
-36:27:59.1 |
HIP 38268 |
18.81 |
| 2026-05-13 00:00 |
07:51:32.71 |
-36:27:23.5 |
HIP 38268 |
18.60 |
| 2026-05-13 12:00 |
07:51:34.21 |
-36:26:48.0 |
HIP 38268 |
18.42 |
| 2026-05-14 00:00 |
07:51:35.74 |
-36:26:12.7 |
HIP 38497 |
18.20 |
| 2026-05-14 12:00 |
07:51:37.30 |
-36:25:37.7 |
HIP 38497 |
17.76 |
| 2026-05-15 00:00 |
07:51:38.90 |
-36:25:02.8 |
HIP 38497 |
17.33 |
| 2026-05-15 12:00 |
07:51:40.52 |
-36:24:28.2 |
HIP 38497 |
16.91 |
| 2026-05-16 00:00 |
07:51:42.17 |
-36:23:53.8 |
HIP 38497 |
16.50 |
| 2026-05-16 12:00 |
07:51:43.85 |
-36:23:19.6 |
HIP 38497 |
16.10 |
| 2026-05-17 00:00 |
07:51:45.56 |
-36:22:45.7 |
HIP 38497 |
15.72 |
| 2026-05-17 12:00 |
07:51:47.30 |
-36:22:12.0 |
HIP 38497 |
15.35 |
| 2026-05-18 00:00 |
07:51:49.07 |
-36:21:38.5 |
HIP 38497 |
14.99 |
| 2026-05-18 12:00 |
07:51:50.87 |
-36:21:05.3 |
HIP 38497 |
14.64 |
| 2026-05-19 00:00 |
07:51:52.70 |
-36:20:32.3 |
HIP 38497 |
14.32 |
| 2026-05-19 12:00 |
07:51:54.56 |
-36:19:59.5 |
HIP 38497 |
14.01 |
| 2026-05-20 00:00 |
07:51:56.44 |
-36:19:27.0 |
HIP 38497 |
13.71 |
| 2026-05-20 12:00 |
07:51:58.35 |
-36:18:54.7 |
HIP 38497 |
13.44 |
| 2026-05-21 00:00 |
07:52:00.30 |
-36:18:22.6 |
HIP 38497 |
13.19 |
| 2026-05-21 12:00 |
07:52:02.26 |
-36:17:50.8 |
HIP 38497 |
12.96 |
| 2026-05-22 00:00 |
07:52:04.26 |
-36:17:19.3 |
HIP 38497 |
12.76 |
| 2026-05-22 12:00 |
07:52:06.28 |
-36:16:48.0 |
HIP 38497 |
12.58 |
| 2026-05-23 00:00 |
07:52:08.33 |
-36:16:16.9 |
HIP 38497 |
12.42 |
| 2026-05-23 12:00 |
07:52:10.41 |
-36:15:46.1 |
HIP 38418 |
12.05 |
| 2026-05-24 00:00 |
07:52:12.51 |
-36:15:15.6 |
HIP 38418 |
11.53 |
| 2026-05-24 12:00 |
07:52:14.64 |
-36:14:45.3 |
HIP 38418 |
11.02 |
| 2026-05-25 00:00 |
07:52:16.80 |
-36:14:15.3 |
HIP 38418 |
10.53 |
| 2026-05-25 12:00 |
07:52:18.98 |
-36:13:45.6 |
HIP 38418 |
10.07 |
| 2026-05-26 00:00 |
07:52:21.19 |
-36:13:16.1 |
HIP 38418 |
9.64 |
| 2026-05-26 12:00 |
07:52:23.42 |
-36:12:46.8 |
HIP 38418 |
9.24 |
| 2026-05-27 00:00 |
07:52:25.68 |
-36:12:17.9 |
HIP 38418 |
8.88 |
| 2026-05-27 12:00 |
07:52:27.97 |
-36:11:49.2 |
HIP 38418 |
8.56 |
| 2026-05-28 00:00 |
07:52:30.28 |
-36:11:20.7 |
HIP 38418 |
8.28 |
| 2026-05-28 12:00 |
07:52:32.61 |
-36:10:52.6 |
HIP 38418 |
8.06 |
| 2026-05-29 00:00 |
07:52:34.97 |
-36:10:24.7 |
HIP 38418 |
7.90 |
| 2026-05-29 12:00 |
07:52:37.35 |
-36:09:57.1 |
HIP 38418 |
7.79 |
| 2026-05-30 00:00 |
07:52:39.76 |
-36:09:29.7 |
HIP 38418 |
7.75 |
| 2026-05-30 12:00 |
07:52:42.19 |
-36:09:02.7 |
HIP 38418 |
7.78 |
| 2026-05-31 00:00 |
07:52:44.65 |
-36:08:35.9 |
HIP 38418 |
7.86 |
| 2026-05-31 12:00 |
07:52:47.12 |
-36:08:09.4 |
HIP 38418 |
8.01 |
| 2026-06-01 00:00 |
07:52:49.63 |
-36:07:43.1 |
HIP 38418 |
8.22 |
| 2026-06-01 12:00 |
07:52:52.15 |
-36:07:17.2 |
HIP 38418 |
8.48 |
| 2026-06-02 00:00 |
07:52:54.70 |
-36:06:51.5 |
HIP 38418 |
8.79 |