메타데이터
| 항목 |
값 |
| Designation |
C/2019 T3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-02T19:35:34.825920Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:42:49Z |
| Obs used |
1831 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-10-06T14:39:22.665600Z |
| Discovery magnitude (MPC) |
18.93 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-06-17.0000000 |
| e |
0.99811606 |
| q (au) |
5.946571 |
| a (au) |
3156.462242 |
| i (deg) |
121.862226 |
| Ω (om, deg) |
139.520856 |
| ω (w, deg) |
112.287720 |
| M (ma, deg) |
0.000590 |
밝기
산란 + 전체 선형
$$
M_a = (0.980 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
0.980 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.905 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-01-17 |
2021-02-11 |
+8.5092 |
-6.642 |
| 2021-04-20 |
2022-07-29 |
-1.2668 |
+0.601 |
| 2022-07-29 |
2023-08-18 |
+15.8970 |
-13.656 |
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 |
21:10:39.59 |
-40:02:43.9 |
HIP 104555 |
4.34 |
| 2026-03-26 12:00 |
21:10:45.75 |
-40:03:34.8 |
HIP 104555 |
5.08 |
| 2026-03-27 00:00 |
21:10:51.85 |
-40:04:26.4 |
HIP 104555 |
6.09 |
| 2026-03-27 12:00 |
21:10:57.88 |
-40:05:18.4 |
HIP 104555 |
7.25 |
| 2026-03-28 00:00 |
21:11:03.84 |
-40:06:11.0 |
HIP 104555 |
8.50 |
| 2026-03-28 12:00 |
21:11:09.74 |
-40:07:04.1 |
HIP 104555 |
9.81 |
| 2026-03-29 00:00 |
21:11:15.57 |
-40:07:57.7 |
HIP 104555 |
11.15 |
| 2026-03-29 12:00 |
21:11:21.33 |
-40:08:51.9 |
HIP 104680 |
12.36 |
| 2026-03-30 00:00 |
21:11:27.02 |
-40:09:46.6 |
HIP 104680 |
10.94 |
| 2026-03-30 12:00 |
21:11:32.64 |
-40:10:41.8 |
HIP 104680 |
9.53 |
| 2026-03-31 00:00 |
21:11:38.20 |
-40:11:37.6 |
HIP 104680 |
8.13 |
| 2026-03-31 12:00 |
21:11:43.68 |
-40:12:33.9 |
HIP 104680 |
6.74 |
| 2026-04-01 00:00 |
21:11:49.09 |
-40:13:30.7 |
HIP 104680 |
5.37 |
| 2026-04-01 12:00 |
21:11:54.44 |
-40:14:28.0 |
HIP 104680 |
4.03 |
| 2026-04-02 00:00 |
21:11:59.71 |
-40:15:25.9 |
HIP 104680 |
2.75 |
| 2026-04-02 12:00 |
21:12:04.91 |
-40:16:24.3 |
HIP 104680 |
1.69 |
| 2026-04-03 00:00 |
21:12:10.04 |
-40:17:23.3 |
HIP 104680 |
1.44 |
| 2026-04-03 12:00 |
21:12:15.09 |
-40:18:22.7 |
HIP 104680 |
2.27 |
| 2026-04-04 00:00 |
21:12:20.08 |
-40:19:22.7 |
HIP 104680 |
3.47 |
| 2026-04-04 12:00 |
21:12:24.99 |
-40:20:23.3 |
HIP 104680 |
4.77 |
| 2026-04-05 00:00 |
21:12:29.82 |
-40:21:24.3 |
HIP 104680 |
6.11 |
| 2026-04-05 12:00 |
21:12:34.58 |
-40:22:25.9 |
HIP 104680 |
7.46 |
| 2026-04-06 00:00 |
21:12:39.27 |
-40:23:28.0 |
HIP 104680 |
8.81 |
| 2026-04-06 12:00 |
21:12:43.88 |
-40:24:30.6 |
HIP 104680 |
10.17 |
| 2026-04-07 00:00 |
21:12:48.41 |
-40:25:33.8 |
HIP 104680 |
11.52 |
| 2026-04-07 12:00 |
21:12:52.87 |
-40:26:37.5 |
HIP 104680 |
12.88 |
| 2026-04-08 00:00 |
21:12:57.25 |
-40:27:41.7 |
HIP 104680 |
14.24 |
| 2026-04-08 12:00 |
21:13:01.56 |
-40:28:46.4 |
HIP 104680 |
15.59 |
| 2026-04-09 00:00 |
21:13:05.78 |
-40:29:51.7 |
HIP 104800 |
15.39 |
| 2026-04-09 12:00 |
21:13:09.93 |
-40:30:57.5 |
HIP 104800 |
14.04 |
| 2026-04-10 00:00 |
21:13:14.00 |
-40:32:03.8 |
HIP 104800 |
12.69 |
| 2026-04-10 12:00 |
21:13:17.99 |
-40:33:10.6 |
HIP 104800 |
11.35 |
| 2026-04-11 00:00 |
21:13:21.90 |
-40:34:17.9 |
HIP 104800 |
10.00 |
| 2026-04-11 12:00 |
21:13:25.73 |
-40:35:25.8 |
HIP 104800 |
8.66 |
| 2026-04-12 00:00 |
21:13:29.48 |
-40:36:34.2 |
HIP 104800 |
7.32 |
| 2026-04-12 12:00 |
21:13:33.15 |
-40:37:43.1 |
HIP 104800 |
5.98 |
| 2026-04-13 00:00 |
21:13:36.74 |
-40:38:52.5 |
HIP 104800 |
4.65 |
| 2026-04-13 12:00 |
21:13:40.24 |
-40:40:02.4 |
HIP 104800 |
3.34 |
| 2026-04-14 00:00 |
21:13:43.66 |
-40:41:12.8 |
HIP 104800 |
2.06 |
| 2026-04-14 12:00 |
21:13:47.00 |
-40:42:23.8 |
HIP 104800 |
1.00 |
| 2026-04-15 00:00 |
21:13:50.26 |
-40:43:35.2 |
HIP 104800 |
1.18 |
| 2026-04-15 12:00 |
21:13:53.43 |
-40:44:47.2 |
HIP 104800 |
2.33 |
| 2026-04-16 00:00 |
21:13:56.51 |
-40:45:59.7 |
HIP 104800 |
3.61 |