메타데이터
| 항목 |
값 |
| Designation |
C/1968 L1 (Whitaker-Thomas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1968-06-04T12:06:59.990400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
23 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1968-07-02.0000000 |
| e |
1.00000000 |
| q (au) |
1.234006 |
| a (au) |
- |
| i (deg) |
61.767368 |
| Ω (om, deg) |
254.716109 |
| ω (w, deg) |
353.977969 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (9.895 + 3.317\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.895 |
| n |
3.317 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
03:55:33.86 |
+38:04:49.4 |
HIP 18358 |
14.04 |
| 2026-05-12 12:00 |
03:55:35.59 |
+38:04:51.9 |
HIP 18358 |
14.02 |
| 2026-05-13 00:00 |
03:55:37.32 |
+38:04:54.6 |
HIP 18358 |
14.00 |
| 2026-05-13 12:00 |
03:55:39.05 |
+38:04:57.3 |
HIP 18358 |
13.99 |
| 2026-05-14 00:00 |
03:55:40.79 |
+38:05:00.0 |
HIP 18358 |
13.99 |
| 2026-05-14 12:00 |
03:55:42.52 |
+38:05:02.8 |
HIP 18358 |
14.00 |
| 2026-05-15 00:00 |
03:55:44.26 |
+38:05:05.7 |
HIP 18358 |
14.02 |
| 2026-05-15 12:00 |
03:55:46.01 |
+38:05:08.6 |
HIP 18358 |
14.04 |
| 2026-05-16 00:00 |
03:55:47.75 |
+38:05:11.5 |
HIP 18358 |
14.07 |
| 2026-05-16 12:00 |
03:55:49.49 |
+38:05:14.6 |
HIP 18358 |
14.11 |
| 2026-05-17 00:00 |
03:55:51.24 |
+38:05:17.6 |
HIP 18358 |
14.15 |
| 2026-05-17 12:00 |
03:55:52.99 |
+38:05:20.8 |
HIP 18358 |
14.21 |
| 2026-05-18 00:00 |
03:55:54.74 |
+38:05:24.0 |
HIP 18358 |
14.27 |
| 2026-05-18 12:00 |
03:55:56.49 |
+38:05:27.2 |
HIP 18358 |
14.34 |
| 2026-05-19 00:00 |
03:55:58.24 |
+38:05:30.5 |
HIP 18358 |
14.41 |
| 2026-05-19 12:00 |
03:55:59.99 |
+38:05:33.9 |
HIP 18358 |
14.49 |
| 2026-05-20 00:00 |
03:56:01.74 |
+38:05:37.3 |
HIP 18358 |
14.58 |
| 2026-05-20 12:00 |
03:56:03.49 |
+38:05:40.8 |
HIP 18358 |
14.68 |
| 2026-05-21 00:00 |
03:56:05.25 |
+38:05:44.3 |
HIP 18358 |
14.78 |
| 2026-05-21 12:00 |
03:56:07.00 |
+38:05:47.8 |
HIP 18358 |
14.89 |
| 2026-05-22 00:00 |
03:56:08.75 |
+38:05:51.5 |
HIP 18358 |
15.01 |
| 2026-05-22 12:00 |
03:56:10.51 |
+38:05:55.1 |
HIP 18358 |
15.13 |
| 2026-05-23 00:00 |
03:56:12.26 |
+38:05:58.9 |
HIP 18358 |
15.26 |
| 2026-05-23 12:00 |
03:56:14.01 |
+38:06:02.7 |
HIP 18358 |
15.40 |
| 2026-05-24 00:00 |
03:56:15.76 |
+38:06:06.5 |
HIP 18358 |
15.54 |
| 2026-05-24 12:00 |
03:56:17.52 |
+38:06:10.4 |
HIP 18358 |
15.69 |
| 2026-05-25 00:00 |
03:56:19.27 |
+38:06:14.3 |
HIP 18358 |
15.84 |
| 2026-05-25 12:00 |
03:56:21.02 |
+38:06:18.3 |
HIP 18358 |
16.00 |
| 2026-05-26 00:00 |
03:56:22.77 |
+38:06:22.3 |
HIP 18358 |
16.16 |
| 2026-05-26 12:00 |
03:56:24.52 |
+38:06:26.4 |
HIP 18358 |
16.33 |
| 2026-05-27 00:00 |
03:56:26.27 |
+38:06:30.5 |
HIP 18358 |
16.51 |
| 2026-05-27 12:00 |
03:56:28.02 |
+38:06:34.7 |
HIP 18358 |
16.69 |
| 2026-05-28 00:00 |
03:56:29.76 |
+38:06:38.9 |
HIP 18358 |
16.87 |
| 2026-05-28 12:00 |
03:56:31.51 |
+38:06:43.2 |
HIP 18358 |
17.06 |
| 2026-05-29 00:00 |
03:56:33.25 |
+38:06:47.5 |
HIP 18358 |
17.25 |
| 2026-05-29 12:00 |
03:56:34.99 |
+38:06:51.9 |
HIP 18358 |
17.44 |
| 2026-05-30 00:00 |
03:56:36.73 |
+38:06:56.3 |
HIP 18358 |
17.64 |
| 2026-05-30 12:00 |
03:56:38.47 |
+38:07:00.8 |
HIP 18358 |
17.85 |
| 2026-05-31 00:00 |
03:56:40.21 |
+38:07:05.3 |
HIP 18358 |
18.06 |
| 2026-05-31 12:00 |
03:56:41.94 |
+38:07:09.9 |
HIP 18358 |
18.27 |
| 2026-06-01 00:00 |
03:56:43.67 |
+38:07:14.5 |
HIP 18358 |
18.48 |
| 2026-06-01 12:00 |
03:56:45.40 |
+38:07:19.2 |
HIP 18358 |
18.70 |
| 2026-06-02 00:00 |
03:56:47.13 |
+38:07:23.9 |
HIP 18358 |
18.92 |