메타데이터
| 항목 |
값 |
| Designation |
C/2001 HT50 (LINEAR-NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-07-09T00:34:23.802240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:09Z |
| Obs used |
3866 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
7.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-11-01.0000000 |
| e |
0.99766027 |
| q (au) |
2.792083 |
| a (au) |
1193.337554 |
| i (deg) |
163.212126 |
| Ω (om, deg) |
42.912495 |
| ω (w, deg) |
324.071020 |
| M (ma, deg) |
0.002749 |
밝기
산란 + 전체 선형
$$
M_a = (7.009 + 3.500\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.009 |
| n |
3.500 |
| gf |
1.000 |
| gb |
-0.552 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
19:13:03.01 |
-07:05:46.6 |
HIP 94404 |
24.07 |
| 2026-03-26 12:00 |
19:13:03.45 |
-07:05:35.3 |
HIP 94404 |
24.27 |
| 2026-03-27 00:00 |
19:13:03.87 |
-07:05:24.0 |
HIP 94404 |
24.47 |
| 2026-03-27 12:00 |
19:13:04.26 |
-07:05:12.8 |
HIP 94404 |
24.67 |
| 2026-03-28 00:00 |
19:13:04.63 |
-07:05:01.6 |
HIP 94404 |
24.87 |
| 2026-03-28 12:00 |
19:13:04.98 |
-07:04:50.4 |
HIP 94404 |
25.06 |
| 2026-03-29 00:00 |
19:13:05.30 |
-07:04:39.2 |
HIP 94404 |
25.26 |
| 2026-03-29 12:00 |
19:13:05.60 |
-07:04:28.1 |
HIP 94404 |
25.45 |
| 2026-03-30 00:00 |
19:13:05.87 |
-07:04:16.9 |
HIP 94404 |
25.65 |
| 2026-03-30 12:00 |
19:13:06.12 |
-07:04:05.9 |
HIP 94404 |
25.84 |
| 2026-03-31 00:00 |
19:13:06.35 |
-07:03:54.8 |
HIP 94404 |
26.03 |
| 2026-03-31 12:00 |
19:13:06.55 |
-07:03:43.8 |
HIP 94404 |
26.22 |
| 2026-04-01 00:00 |
19:13:06.73 |
-07:03:32.7 |
HIP 94404 |
26.41 |
| 2026-04-01 12:00 |
19:13:06.89 |
-07:03:21.8 |
HIP 94404 |
26.59 |
| 2026-04-02 00:00 |
19:13:07.02 |
-07:03:10.8 |
HIP 94404 |
26.78 |
| 2026-04-02 12:00 |
19:13:07.13 |
-07:03:00.0 |
HIP 94404 |
26.96 |
| 2026-04-03 00:00 |
19:13:07.21 |
-07:02:49.0 |
HIP 94404 |
27.15 |
| 2026-04-03 12:00 |
19:13:07.28 |
-07:02:38.2 |
HIP 94404 |
27.33 |
| 2026-04-04 00:00 |
19:13:07.31 |
-07:02:27.4 |
HIP 94404 |
27.51 |
| 2026-04-04 12:00 |
19:13:07.33 |
-07:02:16.6 |
HIP 94404 |
27.69 |
| 2026-04-05 00:00 |
19:13:07.32 |
-07:02:05.8 |
HIP 94404 |
27.86 |
| 2026-04-05 12:00 |
19:13:07.28 |
-07:01:55.1 |
HIP 94404 |
28.04 |
| 2026-04-06 00:00 |
19:13:07.22 |
-07:01:44.5 |
HIP 94404 |
28.21 |
| 2026-04-06 12:00 |
19:13:07.14 |
-07:01:33.8 |
HIP 94404 |
28.38 |
| 2026-04-07 00:00 |
19:13:07.03 |
-07:01:23.2 |
HIP 94404 |
28.55 |
| 2026-04-07 12:00 |
19:13:06.90 |
-07:01:12.7 |
HIP 94404 |
28.72 |
| 2026-04-08 00:00 |
19:13:06.75 |
-07:01:02.1 |
HIP 94404 |
28.89 |
| 2026-04-08 12:00 |
19:13:06.57 |
-07:00:51.7 |
HIP 94404 |
29.06 |
| 2026-04-09 00:00 |
19:13:06.37 |
-07:00:41.2 |
HIP 94404 |
29.22 |
| 2026-04-09 12:00 |
19:13:06.14 |
-07:00:30.8 |
HIP 94404 |
29.39 |
| 2026-04-10 00:00 |
19:13:05.89 |
-07:00:20.5 |
HIP 94404 |
29.55 |
| 2026-04-10 12:00 |
19:13:05.62 |
-07:00:10.2 |
HIP 94404 |
29.71 |
| 2026-04-11 00:00 |
19:13:05.32 |
-07:00:00.0 |
HIP 94404 |
29.87 |
| 2026-04-11 12:00 |
19:13:05.00 |
-06:59:49.7 |
HIP 94404 |
30.03 |
| 2026-04-12 00:00 |
19:13:04.65 |
-06:59:39.6 |
HIP 94404 |
30.19 |
| 2026-04-12 12:00 |
19:13:04.28 |
-06:59:29.4 |
HIP 94404 |
30.35 |
| 2026-04-13 00:00 |
19:13:03.88 |
-06:59:19.4 |
HIP 94404 |
30.50 |
| 2026-04-13 12:00 |
19:13:03.47 |
-06:59:09.3 |
HIP 94404 |
30.66 |
| 2026-04-14 00:00 |
19:13:03.02 |
-06:58:59.4 |
HIP 94404 |
30.81 |
| 2026-04-14 12:00 |
19:13:02.56 |
-06:58:49.5 |
HIP 94404 |
30.96 |
| 2026-04-15 00:00 |
19:13:02.07 |
-06:58:39.6 |
HIP 94404 |
31.12 |
| 2026-04-15 12:00 |
19:13:01.55 |
-06:58:29.8 |
HIP 94404 |
31.27 |
| 2026-04-16 00:00 |
19:13:01.01 |
-06:58:20.0 |
HIP 94384 |
31.23 |