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) |
| 2026-05-12 00:00 |
21:14:31.95 |
-41:59:22.4 |
HIP 104948 |
24.23 |
| 2026-05-12 12:00 |
21:14:30.09 |
-42:00:57.8 |
HIP 104704 |
25.21 |
| 2026-05-13 00:00 |
21:14:28.13 |
-42:02:33.5 |
HIP 104675 |
25.70 |
| 2026-05-13 12:00 |
21:14:26.08 |
-42:04:09.5 |
HIP 104675 |
25.32 |
| 2026-05-14 00:00 |
21:14:23.92 |
-42:05:45.8 |
HIP 104675 |
25.02 |
| 2026-05-14 12:00 |
21:14:21.66 |
-42:07:22.4 |
HIP 104675 |
24.82 |
| 2026-05-15 00:00 |
21:14:19.30 |
-42:08:59.4 |
HIP 104675 |
24.71 |
| 2026-05-15 12:00 |
21:14:16.83 |
-42:10:36.6 |
HIP 104675 |
24.70 |
| 2026-05-16 00:00 |
21:14:14.27 |
-42:12:14.2 |
HIP 104675 |
24.78 |
| 2026-05-16 12:00 |
21:14:11.60 |
-42:13:52.1 |
HIP 104675 |
24.97 |
| 2026-05-17 00:00 |
21:14:08.84 |
-42:15:30.3 |
HIP 104675 |
25.25 |
| 2026-05-17 12:00 |
21:14:05.97 |
-42:17:08.7 |
HIP 104868 |
24.43 |
| 2026-05-18 00:00 |
21:14:03.00 |
-42:18:47.4 |
HIP 104868 |
22.96 |
| 2026-05-18 12:00 |
21:13:59.93 |
-42:20:26.4 |
HIP 104868 |
21.53 |
| 2026-05-19 00:00 |
21:13:56.75 |
-42:22:05.7 |
HIP 104868 |
20.15 |
| 2026-05-19 12:00 |
21:13:53.48 |
-42:23:45.3 |
HIP 104868 |
18.83 |
| 2026-05-20 00:00 |
21:13:50.10 |
-42:25:25.1 |
HIP 104868 |
17.60 |
| 2026-05-20 12:00 |
21:13:46.62 |
-42:27:05.1 |
HIP 104868 |
16.48 |
| 2026-05-21 00:00 |
21:13:43.04 |
-42:28:45.4 |
HIP 104868 |
15.49 |
| 2026-05-21 12:00 |
21:13:39.36 |
-42:30:25.9 |
HIP 104868 |
14.66 |
| 2026-05-22 00:00 |
21:13:35.57 |
-42:32:06.7 |
HIP 104868 |
14.03 |
| 2026-05-22 12:00 |
21:13:31.69 |
-42:33:47.7 |
HIP 104868 |
13.63 |
| 2026-05-23 00:00 |
21:13:27.70 |
-42:35:28.9 |
HIP 104868 |
13.48 |
| 2026-05-23 12:00 |
21:13:23.61 |
-42:37:10.4 |
HIP 104868 |
13.60 |
| 2026-05-24 00:00 |
21:13:19.42 |
-42:38:52.0 |
HIP 104868 |
13.98 |
| 2026-05-24 12:00 |
21:13:15.13 |
-42:40:33.8 |
HIP 104868 |
14.61 |
| 2026-05-25 00:00 |
21:13:10.74 |
-42:42:15.9 |
HIP 104868 |
15.46 |
| 2026-05-25 12:00 |
21:13:06.25 |
-42:43:58.1 |
HIP 104868 |
16.50 |
| 2026-05-26 00:00 |
21:13:01.65 |
-42:45:40.5 |
HIP 104868 |
17.70 |
| 2026-05-26 12:00 |
21:12:56.96 |
-42:47:23.1 |
HIP 104868 |
19.03 |
| 2026-05-27 00:00 |
21:12:52.16 |
-42:49:05.9 |
HIP 104868 |
20.48 |
| 2026-05-27 12:00 |
21:12:47.27 |
-42:50:48.8 |
HIP 104794 |
20.33 |
| 2026-05-28 00:00 |
21:12:42.27 |
-42:52:31.9 |
HIP 104794 |
19.47 |
| 2026-05-28 12:00 |
21:12:37.17 |
-42:54:15.1 |
HIP 104794 |
18.78 |
| 2026-05-29 00:00 |
21:12:31.98 |
-42:55:58.5 |
HIP 104794 |
18.30 |
| 2026-05-29 12:00 |
21:12:26.68 |
-42:57:42.1 |
HIP 104794 |
18.02 |
| 2026-05-30 00:00 |
21:12:21.28 |
-42:59:25.7 |
HIP 104794 |
17.98 |
| 2026-05-30 12:00 |
21:12:15.78 |
-43:01:09.5 |
HIP 104794 |
18.17 |
| 2026-05-31 00:00 |
21:12:10.19 |
-43:02:53.4 |
HIP 104794 |
18.59 |
| 2026-05-31 12:00 |
21:12:04.49 |
-43:04:37.5 |
HIP 104794 |
19.23 |
| 2026-06-01 00:00 |
21:11:58.69 |
-43:06:21.6 |
HIP 104794 |
20.08 |
| 2026-06-01 12:00 |
21:11:52.80 |
-43:08:05.9 |
HIP 104794 |
21.10 |
| 2026-06-02 00:00 |
21:11:46.80 |
-43:09:50.2 |
HIP 104508 |
21.97 |