메타데이터
| 항목 |
값 |
| Designation |
C/2003 T4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-04-03T15:45:28.166400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:34Z |
| Obs used |
955 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
6.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2004-10-20.0000000 |
| e |
1.00047448 |
| q (au) |
0.849741 |
| a (au) |
-1790.885861 |
| i (deg) |
86.761193 |
| Ω (om, deg) |
93.902875 |
| ω (w, deg) |
181.679273 |
| M (ma, deg) |
-0.002154 |
밝기
산란 + 전체 선형
$$
M_a = (7.953 + 4.136\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.953 |
| n |
4.136 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.988 |
| δ90 |
1.000 |
| 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 |
| 2003-10-13 |
2004-05-22 |
+1.4145 |
-1.791 |
| 2004-05-22 |
2004-09-06 |
+1.1723 |
-1.351 |
| 2004-09-06 |
2005-04-02 |
-1.5294 |
-0.289 |
| 2005-04-03 |
2005-05-04 |
+13.8649 |
+1.663 |
| 2005-05-04 |
2006-03-25 |
+0.8135 |
+1.141 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
06:06:32.15 |
+08:41:19.6 |
HIP 29027 |
28.56 |
| 2026-03-26 12:00 |
06:06:32.31 |
+08:41:31.6 |
HIP 29027 |
28.72 |
| 2026-03-27 00:00 |
06:06:32.50 |
+08:41:43.6 |
HIP 29027 |
28.88 |
| 2026-03-27 12:00 |
06:06:32.71 |
+08:41:55.5 |
HIP 29027 |
29.03 |
| 2026-03-28 00:00 |
06:06:32.95 |
+08:42:07.5 |
HIP 29027 |
29.18 |
| 2026-03-28 12:00 |
06:06:33.20 |
+08:42:19.4 |
HIP 29002 |
29.05 |
| 2026-03-29 00:00 |
06:06:33.49 |
+08:42:31.3 |
HIP 29002 |
28.84 |
| 2026-03-29 12:00 |
06:06:33.80 |
+08:42:43.2 |
HIP 29002 |
28.63 |
| 2026-03-30 00:00 |
06:06:34.13 |
+08:42:55.1 |
HIP 29002 |
28.41 |
| 2026-03-30 12:00 |
06:06:34.48 |
+08:43:07.0 |
HIP 29002 |
28.20 |
| 2026-03-31 00:00 |
06:06:34.86 |
+08:43:18.8 |
HIP 29002 |
27.98 |
| 2026-03-31 12:00 |
06:06:35.27 |
+08:43:30.6 |
HIP 29002 |
27.77 |
| 2026-04-01 00:00 |
06:06:35.69 |
+08:43:42.4 |
HIP 29002 |
27.55 |
| 2026-04-01 12:00 |
06:06:36.15 |
+08:43:54.1 |
HIP 29002 |
27.33 |
| 2026-04-02 00:00 |
06:06:36.62 |
+08:44:05.9 |
HIP 29002 |
27.10 |
| 2026-04-02 12:00 |
06:06:37.12 |
+08:44:17.6 |
HIP 29002 |
26.88 |
| 2026-04-03 00:00 |
06:06:37.64 |
+08:44:29.2 |
HIP 29002 |
26.66 |
| 2026-04-03 12:00 |
06:06:38.19 |
+08:44:40.9 |
HIP 29002 |
26.43 |
| 2026-04-04 00:00 |
06:06:38.76 |
+08:44:52.5 |
HIP 29002 |
26.21 |
| 2026-04-04 12:00 |
06:06:39.35 |
+08:45:04.1 |
HIP 29002 |
25.98 |
| 2026-04-05 00:00 |
06:06:39.96 |
+08:45:15.7 |
HIP 29002 |
25.75 |
| 2026-04-05 12:00 |
06:06:40.60 |
+08:45:27.2 |
HIP 29002 |
25.52 |
| 2026-04-06 00:00 |
06:06:41.26 |
+08:45:38.7 |
HIP 29002 |
25.29 |
| 2026-04-06 12:00 |
06:06:41.95 |
+08:45:50.2 |
HIP 29002 |
25.06 |
| 2026-04-07 00:00 |
06:06:42.66 |
+08:46:01.6 |
HIP 29002 |
24.83 |
| 2026-04-07 12:00 |
06:06:43.39 |
+08:46:13.0 |
HIP 29002 |
24.60 |
| 2026-04-08 00:00 |
06:06:44.15 |
+08:46:24.4 |
HIP 29002 |
24.37 |
| 2026-04-08 12:00 |
06:06:44.92 |
+08:46:35.7 |
HIP 29002 |
24.14 |
| 2026-04-09 00:00 |
06:06:45.72 |
+08:46:47.1 |
HIP 29002 |
23.91 |
| 2026-04-09 12:00 |
06:06:46.55 |
+08:46:58.3 |
HIP 29002 |
23.68 |
| 2026-04-10 00:00 |
06:06:47.39 |
+08:47:09.6 |
HIP 29002 |
23.45 |
| 2026-04-10 12:00 |
06:06:48.26 |
+08:47:20.8 |
HIP 29002 |
23.21 |
| 2026-04-11 00:00 |
06:06:49.15 |
+08:47:31.9 |
HIP 29002 |
22.98 |
| 2026-04-11 12:00 |
06:06:50.07 |
+08:47:43.0 |
HIP 29002 |
22.76 |
| 2026-04-12 00:00 |
06:06:51.00 |
+08:47:54.1 |
HIP 29002 |
22.53 |
| 2026-04-12 12:00 |
06:06:51.96 |
+08:48:05.2 |
HIP 29002 |
22.30 |
| 2026-04-13 00:00 |
06:06:52.94 |
+08:48:16.2 |
HIP 29002 |
22.07 |
| 2026-04-13 12:00 |
06:06:53.94 |
+08:48:27.1 |
HIP 29002 |
21.85 |
| 2026-04-14 00:00 |
06:06:54.97 |
+08:48:38.0 |
HIP 29002 |
21.63 |
| 2026-04-14 12:00 |
06:06:56.01 |
+08:48:48.9 |
HIP 29002 |
21.41 |
| 2026-04-15 00:00 |
06:06:57.08 |
+08:48:59.7 |
HIP 29002 |
21.19 |
| 2026-04-15 12:00 |
06:06:58.17 |
+08:49:10.5 |
HIP 29002 |
20.98 |
| 2026-04-16 00:00 |
06:06:59.29 |
+08:49:21.3 |
HIP 29002 |
20.76 |